diff --git a/animation.py b/animation.py
index f131be8..d20750c 100644
--- a/animation.py
+++ b/animation.py
@@ -239,6 +239,29 @@ class RotatingRainbowKitchenWhite(Animation):
     def name(self):
         return "kitchenlight"
 
+class RotatingRainbowBeamerBlack(Animation):
+    def __init__(self, looptime=50.0):
+        super(RotatingRainbowBeamerBlack, self).__init__()
+        self.looptime = looptime
+        pass
+
+    def update(self, index, count):
+        """
+        Same as RotatingRainbow but the lights on the projector side are mapped to black
+        """
+        if (index in [2, 4, 5, 6]):
+            rgb = (0, 0, 0)
+        else:
+            hue = (time() / self.looptime + (index + 0.0) / count) % 1.0
+            rgb = hsv_to_rgb(hue, 1, 1)
+        return rgb
+
+    def __str__(self):
+        return f"{type(self).__name__}"
+
+    def name(self):
+        return "beamermode"
+
 
 class Chase(Steady):
     def __init__(self, color, looptime=1.0):
@@ -306,4 +329,4 @@ def hsv_to_rgb(h, s, v):
     return [int(r * 255), int(g * 255), int(b * 255)]
 
 def rgb_to_hsv(r, g, b):
-    return colorsys.rgb_to_hsv(r/255,g/255,b/255)
\ No newline at end of file
+    return colorsys.rgb_to_hsv(r/255,g/255,b/255)
diff --git a/dmx.py b/dmx.py
index edafb2f..e7fdd5c 100644
--- a/dmx.py
+++ b/dmx.py
@@ -6,7 +6,7 @@ from time import sleep
 from typing import Union
 
 from animation import Animation, Off, RandomSingle, Steady, FadeTo, RotatingRainbow, Chase, TwoColor, Caramelldansen, \
-    Hackertours, RotatingRainbowKitchenWhite
+    Hackertours, RotatingRainbowKitchenWhite, RotatingRainbowBeamerBlack
 
 
 def ledlog(value):
@@ -154,6 +154,8 @@ class DMX:
                 animation = Hackertours(self._color)
             elif animation == "kitchenlight":
                 animation = RotatingRainbowKitchenWhite()
+             elif animation == "beamermode":
+                animation = RotatingRainbowBeamerBlack()
             else:
                 raise ValueError(f"No such animation {animation}")
         self._animation = animation
diff --git a/poetry.lock b/poetry.lock
index 362ac06..0fdf274 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,4 +1,4 @@
-# This file is automatically @generated by Poetry 2.3.4 and should not be changed by hand.
+# This file is automatically @generated by Poetry 1.8.4 and should not be changed by hand.
 
 [[package]]
 name = "bottle"
@@ -6,25 +6,12 @@ version = "0.12.25"
 description = "Fast and simple WSGI-framework for small web-applications."
 optional = false
 python-versions = "*"
-groups = ["main"]
 files = [
     {file = "bottle-0.12.25-py3-none-any.whl", hash = "sha256:d6f15f9d422670b7c073d63bd8d287b135388da187a0f3e3c19293626ce034ea"},
     {file = "bottle-0.12.25.tar.gz", hash = "sha256:e1a9c94970ae6d710b3fb4526294dfeb86f2cb4a81eff3a4b98dc40fb0e5e021"},
 ]
 
-[[package]]
-name = "legacy-cgi"
-version = "2.6.4"
-description = "Fork of the standard library cgi and cgitb modules removed in Python 3.13"
-optional = false
-python-versions = ">=3.8"
-groups = ["main"]
-files = [
-    {file = "legacy_cgi-2.6.4-py3-none-any.whl", hash = "sha256:7e235ce58bf1e25d1fc9b2d299015e4e2cd37305eccafec1e6bac3fc04b878cd"},
-    {file = "legacy_cgi-2.6.4.tar.gz", hash = "sha256:abb9dfc7835772f7c9317977c63253fd22a7484b5c9bbcdca60a29dcce97c577"},
-]
-
 [metadata]
-lock-version = "2.1"
+lock-version = "2.0"
 python-versions = "^3.9"
-content-hash = "19caa4a129f9c7cc8e35e26de5edb2eb372f191ab9dfa0c5cc57b75dc04a8d9a"
+content-hash = "861e3ad9d0b00deb876d2ca7797a608f215c7b91ec9b38f367b24bd096a28478"
diff --git a/pyproject.toml b/pyproject.toml
index 72af8fe..01bb425 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -3,12 +3,13 @@ name = "foobazdmx"
 version = "0.1.0"
 description = ""
 authors = ["Stefan Bethke <stb@lassitu.de>"]
-package-mode = false
+#package-mode = false
 
 [tool.poetry.dependencies]
 python = "^3.9"
 bottle = "^0.12.21"
-legacy-cgi = "^2.6.4"
+
+[tool.poetry.dev-dependencies]
 
 [build-system]
 requires = ["poetry-core>=1.0.0"]
diff --git a/views/index.tpl b/views/index.tpl
index 02d19f1..07c0b15 100644
--- a/views/index.tpl
+++ b/views/index.tpl
@@ -25,6 +25,10 @@
         <div>
             <input type="radio" class="js_animation" name="state" id="animation_kitchenlight" value="kitchenlight"/>
             <label for="animation_kitchenlight">Kitchenlight</label>
+        </div>
+         <div>
+            <input type="radio" class="js_animation" name="state" id="animation_beamermode" value="beamermode"/>
+            <label for="animation_kitchenlight">Beamer Mode</label>
         </div>
         % end
         <div>
@@ -50,4 +54,4 @@
     </fieldset>
 </div>
 </body>
-</html>
\ No newline at end of file
+</html>