initialized a knobs module

main.py

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+# Example file showing a basic pygame "game loop"
+import pygame
+from knob import *
+
+# pygame setup
+pygame.init()
+screenW = 561
+screenH = 325
+screen = pygame.display.set_mode((screenW, screenH))
+knob1 = Knob(screen)
+
+clock = pygame.time.Clock()
+running = True
+
+while running:
+    # poll for events
+    # pygame.QUIT event means the user clicked X to close your window
+    for event in pygame.event.get():
+        if event.type == pygame.QUIT:
+            running = False
+
+    # fill the screen with a color to wipe away anything from last frame
+    screen.fill("black")
+
+    # RENDER YOUR GAME HERE
+    knob1.display()
+
+
+    # flip() the display to put your work on screen
+    pygame.display.flip()
+
+    clock.tick(60)  # limits FPS to 60
+
+pygame.quit()