diff --git a/knob.py b/knob.py
index b61754f..10b7f03 100644
--- a/knob.py
+++ b/knob.py
@@ -5,8 +5,8 @@ class Knob:
     
     def __init__(self, screen, color, radius, position):
         self.screen = screen
+        self.color = color
         self.radius = radius
-        self.fill_color = color
         self.position = position
         self.value = 0
 
@@ -14,11 +14,12 @@ class Knob:
         self.value = value
 
     def get_pointer_position(self):
-        x = self.radius * math.cos((self.value * 0.8 * 2 + 0.7) * math.pi) + self.position[0]
-        y = self.radius * math.sin((self.value * 0.8 * 2 + 0.7) * math.pi) + self.position[1]
+        angle = (self.value * 0.8 * 2 + 0.7) * math.pi
+        x = self.radius * math.cos(angle) + self.position[0]
+        y = self.radius * math.sin(angle) + self.position[1]
         return(x, y)
 
     def display(self):
-        pygame.draw.circle(self.screen, self.fill_color, self.position, self.radius)
+        pygame.draw.circle(self.screen, self.color, self.position, self.radius)
         pygame.draw.line(self.screen, "black", self.position, self.get_pointer_position(), 3)
         
\ No newline at end of file
diff --git a/main.py b/main.py
index 4d43376..ca864aa 100644
--- a/main.py
+++ b/main.py
@@ -7,6 +7,7 @@ screenW = 561
 screenH = 325
 screen = pygame.display.set_mode((screenW, screenH))
 
+# Create and position the knobs
 knobs_radius = screenW / 25
 knobs_spacing = knobs_radius * 2
 knobs_x = (screenW - (knobs_radius + knobs_spacing) * 2) / 2