diff --git a/constants.py b/constants.py
index 5a4e29bc..0298b618 100644
--- a/constants.py
+++ b/constants.py
@@ -106,7 +106,8 @@ BOTTOM = FRAME_Y_RADIUS * DOWN
 LEFT_SIDE = FRAME_X_RADIUS * LEFT
 RIGHT_SIDE = FRAME_X_RADIUS * RIGHT
 
-TAU = 2 * np.pi
+PI = np.pi
+TAU = 2 * PI
 DEGREES = TAU / 360
 
 ANIMATIONS_DIR = os.path.join(MEDIA_DIR, "animations")