diff --git a/dmx.py b/dmx.py
index 892143e..7b35c67 100644
--- a/dmx.py
+++ b/dmx.py
@@ -1,6 +1,7 @@
 import colorsys
 import socket
 import struct
+import threading
 from threading import Thread
 from time import sleep, time
 
@@ -10,6 +11,10 @@ def hsv_to_rgb(h, s, v):
     return [int(r * 255), int(g * 255), int(b * 255)]
 
 
+def ledlog(value):
+    # return int(pow(float(value)/255.0, 2))*255
+    return value
+
 
 class RGB:
     def __init__(self, dmx, slot, offset=0):
@@ -19,9 +24,9 @@ class RGB:
 
     def rgb(self, color):
         (r, g, b) = color
-        self.dmx.set(self.slot+self.offset+0, r)
-        self.dmx.set(self.slot+self.offset+1, g)
-        self.dmx.set(self.slot+self.offset+2, b)
+        self.dmx.set(self.slot+self.offset+0, ledlog(r))
+        self.dmx.set(self.slot+self.offset+1, ledlog(g))
+        self.dmx.set(self.slot+self.offset+2, ledlog(b))
 
 class Bar252(RGB):
     def __init__(self, dmx, slot=1):
@@ -30,6 +35,12 @@ class Bar252(RGB):
         dmx.set(self.slot+1, 0)
 
 
+class REDSpot18RGB(RGB):
+    def __init__(self, dmx, slot=1):
+        super(REDSpot18RGB, self).__init__(dmx, slot, 1)
+        dmx.set(self.slot+0, 0)
+
+
 class StairvilleLedPar56(RGB):
     def __init__(self, dmx, slot=1):
         super(StairvilleLedPar56, self).__init__(dmx, slot, 0)
@@ -68,37 +79,55 @@ class FadeTo(Steady):
 
 
 class RotatingRainbow:
-    def __init__(self):
+    def __init__(self, looptime=10.0):
+        self.looptime = looptime
         pass
 
     def update(self, index, count):
         """
-        One full round takes 10 seconds, each RGB is offset in a circle
+        One full round takes self.looptime seconds, each RGB is offset in a circle
         :param index:
         :param count:
         :return:
         """
-        hue = (time() / 10.0 + (index + 0.0) / count) % 1.0
+        hue = (time() / self.looptime + (index + 0.0) / count) % 1.0
         rgb = hsv_to_rgb(hue, 1, 1)
         return rgb
 
     def __str__(self):
         return "RotatingRainbow"
 
+
+class Chase(Steady):
+    def __init__(self, r, g, b, looptime=1.0):
+        super(Chase, self).__init__(r, g, b)
+        self.looptime = looptime
+
+    def update(self, index, count):
+        angle = (time() / self.looptime + (index + 0.0) / count) % 1.0
+        l = 1 - min(abs(angle - 2.0 / count), 1.0 / count) * count
+        # print(f"f({index}, {angle:.2f}) -> {l:.2f}")
+        return (int(self.r * l), int(self.g * l), int(self.b * l))
+
+    def __str__(self):
+        return f"fadeTo({self.r}, {self.g}, {self.b})"
+
+
 class DMX:
-    def __init__(self, host, port=0x1936, universe=1):
+    def __init__(self, host, port=0x1936, universe=1, maxchan=512):
         self.host = host
         self.port = port
         self.universe = universe
         self.socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)  # UDP
         self.socket.setblocking(False)
-        self.data = bytearray(512)
+        self.data = bytearray(maxchan)
         packet = bytearray()
         packet.extend(map(ord, "Art-Net"))
         packet.append(0x00)          # Null terminate Art-Net
         packet.extend([0x00, 0x50])  # Opcode ArtDMX 0x5000 (Little endian)
         packet.extend([0x00, 0x0e])  # Protocol version 14
         self.header = packet
+        self.sequence = 1
         self.animation = FadeTo(255, 255, 255)
         self.rgbs = []
         self.thread = None
@@ -122,14 +151,19 @@ class DMX:
 
     def update(self):
         packet = self.header[:]
-        packet.append(0)              # Sequence,
+        packet.append(self.sequence)              # Sequence,
         packet.append(0x00)                                 # Physical
         packet.append(self.universe & 0xFF)                   # Universe LowByte
         packet.append(self.universe >> 8 & 0xFF)              # Universe HighByte
 
-        packet.extend(struct.pack('>h', 512))  # Pack the number of channels Big endian
+        packet.extend(struct.pack('>h', len(self.data)))  # Pack the number of channels Big endian
         packet.extend(self.data)
         self.socket.sendto(packet, (self.host, self.port))
+        # print(f"sent {len(packet)} bytes, {threading.get_native_id()}")
+
+        self.sequence += 1
+        if self.sequence > 255:
+            self.sequence = 1
 
     def set(self, slot, value):
         self.data[slot-1] = value
diff --git a/foobaz.py b/foobaz.py
index 73a8fdd..ba2d464 100644
--- a/foobaz.py
+++ b/foobaz.py
@@ -1,8 +1,12 @@
 #!/usr/bin/env python
 
+import argparse
+import sys
+from time import sleep
+
 from bottle import route, run, static_file, template, view
 
-from dmx import DMX, Bar252, StairvilleLedPar56, Steady, RotatingRainbow
+from dmx import DMX, Bar252, StairvilleLedPar56, Steady, RotatingRainbow, REDSpot18RGB, Chase
 
 
 @route('/')
@@ -27,23 +31,50 @@ def update(state):
         dmx.setAnimation(Steady(0, 0, 255))
     elif state == "rainbow":
         dmx.setAnimation(RotatingRainbow())
+    elif state == "chase-blue":
+        dmx.setAnimation(Chase(0, 0, 255))
     dmx.start()
     return {'result': 'ok'}
 
-dmx = DMX("10.31.242.35")
+def main(args):
+    global dmx
 
-dmx.rgbs = [
-    StairvilleLedPar56(dmx, 1),
-    StairvilleLedPar56(dmx, 8),
-    StairvilleLedPar56(dmx, 15),
-    StairvilleLedPar56(dmx, 22),
-    Bar252(dmx, 29),
-    Bar252(dmx, 40),
-    Bar252(dmx, 51),
-    Bar252(dmx, 62),
-]
-dmx.update()
-dmx.start()
+    parser = argparse.ArgumentParser(prog='foobazdmx', description='Make the lights flicker.')
+    parser.add_argument('-a', '--artnet', type=str, required=True, help="Art-Net server")
+    parser.add_argument('-r', '--room', type=str, required=True, help="light setup for room")
+    args = parser.parse_args(args)
 
-run(host='0.0.0.0', port=8080, server='wsgiref', reloader=True)
+    artnet = args.artnet
 
+    print(f"Starting DMX via Art-Net to {artnet}", file=sys.stderr)
+    # dmx = DMX("10.31.242.35")
+    dmx = DMX(artnet, maxchan=64)
+
+    if args.room == "shop":
+        dmx.rgbs = [
+            REDSpot18RGB(dmx, 1),
+            REDSpot18RGB(dmx, 5),
+            REDSpot18RGB(dmx, 9),
+            REDSpot18RGB(dmx, 13),
+        ]
+    elif args.room == "big":
+        dmx.rgbs = [
+            StairvilleLedPar56(dmx, 1),
+            StairvilleLedPar56(dmx, 8),
+            StairvilleLedPar56(dmx, 15),
+            StairvilleLedPar56(dmx, 22),
+            Bar252(dmx, 29),
+            Bar252(dmx, 40),
+            Bar252(dmx, 51),
+            Bar252(dmx, 62),
+        ]
+    else:
+        print(f"Unknown room {args.room}", file=sys.stderr)
+        sys.exit(64)
+    dmx.update()
+    dmx.start()
+
+    run(host='0.0.0.0', port=8080, reloader=False)
+
+if __name__ == '__main__':
+    main(sys.argv[1:])
diff --git a/poetry.lock b/poetry.lock
index 2a815ad..5a081a6 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,3 +1,32 @@
+[[package]]
+name = "attrs"
+version = "21.4.0"
+description = "Classes Without Boilerplate"
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+
+[package.extras]
+dev = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "mypy", "pytest-mypy-plugins", "zope.interface", "furo", "sphinx", "sphinx-notfound-page", "pre-commit", "cloudpickle"]
+docs = ["furo", "sphinx", "zope.interface", "sphinx-notfound-page"]
+tests = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "mypy", "pytest-mypy-plugins", "zope.interface", "cloudpickle"]
+tests_no_zope = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "mypy", "pytest-mypy-plugins", "cloudpickle"]
+
+[[package]]
+name = "automat"
+version = "20.2.0"
+description = "Self-service finite-state machines for the programmer on the go."
+category = "main"
+optional = false
+python-versions = "*"
+
+[package.dependencies]
+attrs = ">=19.2.0"
+six = "*"
+
+[package.extras]
+visualize = ["graphviz (>0.5.1)", "Twisted (>=16.1.1)"]
+
 [[package]]
 name = "bottle"
 version = "0.12.21"
@@ -6,13 +35,225 @@ category = "main"
 optional = false
 python-versions = "*"
 
+[[package]]
+name = "constantly"
+version = "15.1.0"
+description = "Symbolic constants in Python"
+category = "main"
+optional = false
+python-versions = "*"
+
+[[package]]
+name = "hyperlink"
+version = "21.0.0"
+description = "A featureful, immutable, and correct URL for Python."
+category = "main"
+optional = false
+python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+
+[package.dependencies]
+idna = ">=2.5"
+
+[[package]]
+name = "idna"
+version = "3.3"
+description = "Internationalized Domain Names in Applications (IDNA)"
+category = "main"
+optional = false
+python-versions = ">=3.5"
+
+[[package]]
+name = "incremental"
+version = "21.3.0"
+description = "A small library that versions your Python projects."
+category = "main"
+optional = false
+python-versions = "*"
+
+[package.extras]
+scripts = ["click (>=6.0)", "twisted (>=16.4.0)"]
+
+[[package]]
+name = "six"
+version = "1.16.0"
+description = "Python 2 and 3 compatibility utilities"
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
+
+[[package]]
+name = "twisted"
+version = "22.4.0"
+description = "An asynchronous networking framework written in Python"
+category = "main"
+optional = false
+python-versions = ">=3.6.7"
+
+[package.dependencies]
+attrs = ">=19.2.0"
+Automat = ">=0.8.0"
+constantly = ">=15.1"
+hyperlink = ">=17.1.1"
+incremental = ">=21.3.0"
+twisted-iocpsupport = {version = ">=1.0.2,<2", markers = "platform_system == \"Windows\""}
+typing-extensions = ">=3.6.5"
+"zope.interface" = ">=4.4.2"
+
+[package.extras]
+all_non_platform = ["cython-test-exception-raiser (>=1.0.2,<2)", "PyHamcrest (>=1.9.0)", "pyopenssl (>=16.0.0)", "service-identity (>=18.1.0)", "idna (>=2.4)", "pyasn1", "cryptography (>=2.6)", "appdirs (>=1.4.0)", "bcrypt (>=3.0.0)", "pyserial (>=3.0)", "h2 (>=3.0,<5.0)", "priority (>=1.1.0,<2.0)", "pywin32 (!=226)", "contextvars (>=2.4,<3)"]
+conch = ["pyasn1", "cryptography (>=2.6)", "appdirs (>=1.4.0)", "bcrypt (>=3.0.0)"]
+conch_nacl = ["pyasn1", "cryptography (>=2.6)", "appdirs (>=1.4.0)", "bcrypt (>=3.0.0)", "pynacl"]
+contextvars = ["contextvars (>=2.4,<3)"]
+dev = ["towncrier (>=19.2,<20.0)", "sphinx-rtd-theme (>=0.5,<1.0)", "readthedocs-sphinx-ext (>=2.1,<3.0)", "sphinx (>=4.1.2,<6)", "pyflakes (>=2.2,<3.0)", "twistedchecker (>=0.7,<1.0)", "coverage (>=6b1,<7)", "python-subunit (>=1.4,<2.0)", "pydoctor (>=21.9.0,<21.10.0)"]
+dev_release = ["towncrier (>=19.2,<20.0)", "sphinx-rtd-theme (>=0.5,<1.0)", "readthedocs-sphinx-ext (>=2.1,<3.0)", "sphinx (>=4.1.2,<6)", "pydoctor (>=21.9.0,<21.10.0)"]
+http2 = ["h2 (>=3.0,<5.0)", "priority (>=1.1.0,<2.0)"]
+macos_platform = ["pyobjc-core", "pyobjc-framework-cfnetwork", "pyobjc-framework-cocoa", "cython-test-exception-raiser (>=1.0.2,<2)", "PyHamcrest (>=1.9.0)", "pyopenssl (>=16.0.0)", "service-identity (>=18.1.0)", "idna (>=2.4)", "pyasn1", "cryptography (>=2.6)", "appdirs (>=1.4.0)", "bcrypt (>=3.0.0)", "pyserial (>=3.0)", "h2 (>=3.0,<5.0)", "priority (>=1.1.0,<2.0)", "pywin32 (!=226)", "contextvars (>=2.4,<3)"]
+mypy = ["mypy (==0.930)", "mypy-zope (==0.3.4)", "types-setuptools", "types-pyopenssl", "towncrier (>=19.2,<20.0)", "sphinx-rtd-theme (>=0.5,<1.0)", "readthedocs-sphinx-ext (>=2.1,<3.0)", "sphinx (>=4.1.2,<6)", "pyflakes (>=2.2,<3.0)", "twistedchecker (>=0.7,<1.0)", "coverage (>=6b1,<7)", "cython-test-exception-raiser (>=1.0.2,<2)", "PyHamcrest (>=1.9.0)", "pyopenssl (>=16.0.0)", "service-identity (>=18.1.0)", "idna (>=2.4)", "pyasn1", "cryptography (>=2.6)", "appdirs (>=1.4.0)", "bcrypt (>=3.0.0)", "pyserial (>=3.0)", "h2 (>=3.0,<5.0)", "priority (>=1.1.0,<2.0)", "pynacl", "pywin32 (!=226)", "python-subunit (>=1.4,<2.0)", "contextvars (>=2.4,<3)", "pydoctor (>=21.9.0,<21.10.0)"]
+osx_platform = ["pyobjc-core", "pyobjc-framework-cfnetwork", "pyobjc-framework-cocoa", "cython-test-exception-raiser (>=1.0.2,<2)", "PyHamcrest (>=1.9.0)", "pyopenssl (>=16.0.0)", "service-identity (>=18.1.0)", "idna (>=2.4)", "pyasn1", "cryptography (>=2.6)", "appdirs (>=1.4.0)", "bcrypt (>=3.0.0)", "pyserial (>=3.0)", "h2 (>=3.0,<5.0)", "priority (>=1.1.0,<2.0)", "pywin32 (!=226)", "contextvars (>=2.4,<3)"]
+serial = ["pyserial (>=3.0)", "pywin32 (!=226)"]
+test = ["cython-test-exception-raiser (>=1.0.2,<2)", "PyHamcrest (>=1.9.0)"]
+tls = ["pyopenssl (>=16.0.0)", "service-identity (>=18.1.0)", "idna (>=2.4)"]
+windows_platform = ["pywin32 (!=226)", "cython-test-exception-raiser (>=1.0.2,<2)", "PyHamcrest (>=1.9.0)", "pyopenssl (>=16.0.0)", "service-identity (>=18.1.0)", "idna (>=2.4)", "pyasn1", "cryptography (>=2.6)", "appdirs (>=1.4.0)", "bcrypt (>=3.0.0)", "pyserial (>=3.0)", "h2 (>=3.0,<5.0)", "priority (>=1.1.0,<2.0)", "pywin32 (!=226)", "contextvars (>=2.4,<3)"]
+
+[[package]]
+name = "twisted-iocpsupport"
+version = "1.0.2"
+description = "An extension for use in the twisted I/O Completion Ports reactor."
+category = "main"
+optional = false
+python-versions = "*"
+
+[[package]]
+name = "typing-extensions"
+version = "4.3.0"
+description = "Backported and Experimental Type Hints for Python 3.7+"
+category = "main"
+optional = false
+python-versions = ">=3.7"
+
+[[package]]
+name = "zope.interface"
+version = "5.4.0"
+description = "Interfaces for Python"
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+
+[package.extras]
+docs = ["sphinx", "repoze.sphinx.autointerface"]
+test = ["coverage (>=5.0.3)", "zope.event", "zope.testing"]
+testing = ["coverage (>=5.0.3)", "zope.event", "zope.testing"]
+
 [metadata]
 lock-version = "1.1"
-python-versions = "^3.9"
-content-hash = "7884484664662ef3a2683e8032b957139e6bb0f977eb2755f300188d91168ca9"
+python-versions = "^3.10"
+content-hash = "fd236cc44eafc2f7d2c38bf5a70c826fd6c45e8af5a4c2f6b6109c0ff9544178"
 
 [metadata.files]
+attrs = [
+    {file = "attrs-21.4.0-py2.py3-none-any.whl", hash = "sha256:2d27e3784d7a565d36ab851fe94887c5eccd6a463168875832a1be79c82828b4"},
+    {file = "attrs-21.4.0.tar.gz", hash = "sha256:626ba8234211db98e869df76230a137c4c40a12d72445c45d5f5b716f076e2fd"},
+]
+automat = [
+    {file = "Automat-20.2.0-py2.py3-none-any.whl", hash = "sha256:b6feb6455337df834f6c9962d6ccf771515b7d939bca142b29c20c2376bc6111"},
+    {file = "Automat-20.2.0.tar.gz", hash = "sha256:7979803c74610e11ef0c0d68a2942b152df52da55336e0c9d58daf1831cbdf33"},
+]
 bottle = [
     {file = "bottle-0.12.21-py3-none-any.whl", hash = "sha256:6e1c9817019dae3a8c20adacaf09035251798d2ae2fcc8ce43157ee72965f257"},
     {file = "bottle-0.12.21.tar.gz", hash = "sha256:787c61b6cc02b9c229bf2663011fac53dd8fc197f7f8ad2eeede29d888d7887e"},
 ]
+constantly = [
+    {file = "constantly-15.1.0-py2.py3-none-any.whl", hash = "sha256:dd2fa9d6b1a51a83f0d7dd76293d734046aa176e384bf6e33b7e44880eb37c5d"},
+    {file = "constantly-15.1.0.tar.gz", hash = "sha256:586372eb92059873e29eba4f9dec8381541b4d3834660707faf8ba59146dfc35"},
+]
+hyperlink = [
+    {file = "hyperlink-21.0.0-py2.py3-none-any.whl", hash = "sha256:e6b14c37ecb73e89c77d78cdb4c2cc8f3fb59a885c5b3f819ff4ed80f25af1b4"},
+    {file = "hyperlink-21.0.0.tar.gz", hash = "sha256:427af957daa58bc909471c6c40f74c5450fa123dd093fc53efd2e91d2705a56b"},
+]
+idna = [
+    {file = "idna-3.3-py3-none-any.whl", hash = "sha256:84d9dd047ffa80596e0f246e2eab0b391788b0503584e8945f2368256d2735ff"},
+    {file = "idna-3.3.tar.gz", hash = "sha256:9d643ff0a55b762d5cdb124b8eaa99c66322e2157b69160bc32796e824360e6d"},
+]
+incremental = [
+    {file = "incremental-21.3.0-py2.py3-none-any.whl", hash = "sha256:92014aebc6a20b78a8084cdd5645eeaa7f74b8933f70fa3ada2cfbd1e3b54321"},
+    {file = "incremental-21.3.0.tar.gz", hash = "sha256:02f5de5aff48f6b9f665d99d48bfc7ec03b6e3943210de7cfc88856d755d6f57"},
+]
+six = [
+    {file = "six-1.16.0-py2.py3-none-any.whl", hash = "sha256:8abb2f1d86890a2dfb989f9a77cfcfd3e47c2a354b01111771326f8aa26e0254"},
+    {file = "six-1.16.0.tar.gz", hash = "sha256:1e61c37477a1626458e36f7b1d82aa5c9b094fa4802892072e49de9c60c4c926"},
+]
+twisted = [
+    {file = "Twisted-22.4.0-py3-none-any.whl", hash = "sha256:f9f7a91f94932477a9fc3b169d57f54f96c6e74a23d78d9ce54039a7f48928a2"},
+    {file = "Twisted-22.4.0.tar.gz", hash = "sha256:a047990f57dfae1e0bd2b7df2526d4f16dcdc843774dc108b78c52f2a5f13680"},
+]
+twisted-iocpsupport = [
+    {file = "twisted-iocpsupport-1.0.2.tar.gz", hash = "sha256:72068b206ee809c9c596b57b5287259ea41ddb4774d86725b19f35bf56aa32a9"},
+    {file = "twisted_iocpsupport-1.0.2-cp310-cp310-win32.whl", hash = "sha256:985c06a33f5c0dae92c71a036d1ea63872ee86a21dd9b01e1f287486f15524b4"},
+    {file = "twisted_iocpsupport-1.0.2-cp310-cp310-win_amd64.whl", hash = "sha256:81b3abe3527b367da0220482820cb12a16c661672b7bcfcde328902890d63323"},
+    {file = "twisted_iocpsupport-1.0.2-cp36-cp36m-win32.whl", hash = "sha256:9dbb8823b49f06d4de52721b47de4d3b3026064ef4788ce62b1a21c57c3fff6f"},
+    {file = "twisted_iocpsupport-1.0.2-cp36-cp36m-win_amd64.whl", hash = "sha256:b9fed67cf0f951573f06d560ac2f10f2a4bbdc6697770113a2fc396ea2cb2565"},
+    {file = "twisted_iocpsupport-1.0.2-cp37-cp37m-win32.whl", hash = "sha256:b76b4eed9b27fd63ddb0877efdd2d15835fdcb6baa745cb85b66e5d016ac2878"},
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diff --git a/pyproject.toml b/pyproject.toml
index 548c66e..117eab6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,6 +7,7 @@ authors = ["Stefan Bethke <stb@lassitu.de>"]
 [tool.poetry.dependencies]
 python = "^3.10"
 bottle = "^0.12.21"
+Twisted = "^22.4.0"
 
 [tool.poetry.dev-dependencies]
 
diff --git a/views/index.tpl b/views/index.tpl
index d96a250..36b5f1a 100644
--- a/views/index.tpl
+++ b/views/index.tpl
@@ -29,6 +29,10 @@
             <input type="radio" name="state" id="state_rainbow" value="rainbow" onclick="setstate('rainbow')"/>
             <label for="state_rainbow">Rainbow</label>
         </div>
+        <div>
+            <input type="radio" name="state" id="state_chase_blue" value="chase-blue" onclick="setstate('chase-blue')"/>
+            <label for="state_chase_blue">Blue Chase</label>
+        </div>
     </fieldset>
 </div>
 </body>