diff --git a/physics/DopplerEffect.gif b/physics/DopplerEffect.gif
index b876fa8..52beac2 100644
Binary files a/physics/DopplerEffect.gif and b/physics/DopplerEffect.gif differ
diff --git a/physics/Doppler_Effect/Doppler_Effect.pyde b/physics/Doppler_Effect/Doppler_Effect.pyde
index 9760459..eb4beb7 100644
--- a/physics/Doppler_Effect/Doppler_Effect.pyde
+++ b/physics/Doppler_Effect/Doppler_Effect.pyde
@@ -18,7 +18,7 @@ class SoundWave(object):
         circle(self.x, self.y, self.radius * 2) # diameter
 
 def setup():
-    size(1000, 1000)
+    size(750, 750)
 
     noFill()