diff --git a/ufo/ufo.py b/ufo/ufo.py
index ade77533..d5fa1ec5 100644
--- a/ufo/ufo.py
+++ b/ufo/ufo.py
@@ -1,7 +1,9 @@
-#  UFO Flying Saucer with Circuit Playground Express
-#  https://learn.adafruit.com/ufo-circuit-playground-express/
-#  Plays UFO lights and sounds if the board is upside down only,
-#  Tilt to change light color, cycle speed, tone pitch
+"""
+UFO Flying Saucer with Circuit Playground Express
+https://learn.adafruit.com/ufo-circuit-playground-express/
+Plays UFO lights and sounds if the board is upside down only,
+Tilt to change light color, cycle speed, tone pitch
+"""
 
 import time
 
@@ -13,8 +15,9 @@ from adafruit_circuitplayground.express import cpx
 pixels = neopixel.NeoPixel(board.NEOPIXEL, 10, brightness=.8)
 
 
-def simpleCircle(wait, R, G, B):  # timing, color values per channel
-    baseFreq = int(20 + (G * 0.3))  # tone value derived from rotation
+def simple_circle(wait, red, green, blue):
+    """timing, color values per channel"""
+    baseFreq = int(20 + (green * 0.3))  # tone value derived from rotation
 
     for i in range(10):
         pixels[i] = ((0, 0, 0))
@@ -22,7 +25,7 @@ def simpleCircle(wait, R, G, B):  # timing, color values per channel
         time.sleep(wait)
 
     for i in range(10):
-        pixels[i] = ((R, G, B))
+        pixels[i] = ((red, green, blue))
         time.sleep(wait)
 
 
@@ -41,7 +44,7 @@ while True:
     # check for upside down state on z axis
     if z < 0:  # any negative number on z axis means it's upside down enough
         speed = (0.01 * (B * 0.025))
-        simpleCircle(speed, R, G, B)  # speed based on tilt, .01 is good start
+        simple_circle(speed, R, G, B)  # speed based on tilt, .01 is good start
 
     else:  # right side up means no colors or sound!
         pixels.fill((0, 0, 0))