diff --git a/oin_thermostat/screen.py b/oin_thermostat/screen.py
index 256cb64..8f87590 100644
--- a/oin_thermostat/screen.py
+++ b/oin_thermostat/screen.py
@@ -1,6 +1,6 @@
 import logging
 import math
-from threading import Timer
+from threading import Thread, Timer
 
 import bdfparser
 from sense_hat.sense_hat import SenseHat
@@ -36,6 +36,8 @@ class Screen:
         self._secondary_pixels: list[tuple[int, int, int]] = [(0, 0, 0)] * 8
 
         self.timer = Timer(0, self.set_pixels)
+        self.auto_dim = AutoDim(self.sense)
+        self.auto_dim.start()
 
         self._held = False
         self.sense.stick.direction_middle = self.stick_click
@@ -142,6 +144,43 @@ class Screen:
         return self.font.draw(value, mode=0).crop(8, 7).todata(3)
 
 
+class AutoDim(Thread):
+    def __init__(self, sense: SenseHat):
+        super().__init__()
+
+        self.daemon = True
+        self.sense = sense
+        self.dim = False
+        self.switching = False
+        self.sense.gamma_reset()
+
+    def run(self) -> None:
+        while True:
+            self.auto_dim()
+
+    def auto_dim(self) -> None:
+        accel_z = self.sense.get_accelerometer_raw()["z"]
+
+        if not self.switching and accel_z < 0.9:
+            self.switching = True
+            self.dim = not self.dim
+
+        elif self.switching and accel_z > 0.98:
+            self.switching = False
+
+    @property
+    def dim(self) -> bool:
+        return self._dim
+
+    @dim.setter
+    def dim(self, value: bool) -> None:
+        if value:
+            self.sense.gamma = [0] * 32
+        else:
+            self.sense.gamma_reset()
+        self._dim = value
+
+
 def format_value(value: float) -> str:
     v = math.trunc(value)
     d = "." if (value - v) >= 0.5 else ""
diff --git a/typings/sense_hat/sense_hat.pyi b/typings/sense_hat/sense_hat.pyi
index 247b220..9de2560 100644
--- a/typings/sense_hat/sense_hat.pyi
+++ b/typings/sense_hat/sense_hat.pyi
@@ -106,7 +106,7 @@ class SenseHat:
     def gamma(self): ...
     @gamma.setter
     def gamma(self, buffer): ...
-    def gamma_reset(self):  # -> None:
+    def gamma_reset(self) -> None:  # -> None:
         """
         Resets the LED matrix gamma correction to default
         """
@@ -213,7 +213,9 @@ class SenseHat:
     def accel(self): ...
     @property
     def accelerometer(self): ...
-    def get_accelerometer_raw(self):  # -> dict[str, Any] | dict[str, int]:
+    def get_accelerometer_raw(
+        self,
+    ) -> dict[str, int]:  # -> dict[str, Any] | dict[str, int]:
         """
         Accelerometer x y z raw data in Gs
         """