import pygame

WIDTH = 500
HEIGHT = 500
BLACK = (0, 0, 0)
pygame.init()

sc = pygame.display.set_mode((WIDTH, HEIGHT))
pygame.display.set_caption("")
clock = pygame.time.Clock()
pygame.time.set_timer(pygame.USEREVENT, 100)
running = True

angle1 = 0
angle2 = 0
r = 100
sc.fill(BLACK)
while running:

    for event in pygame.event.get():

        if event.type == pygame.QUIT:
            running = False
        if event.type == pygame.USEREVENT:
              angle2 += 10
              if angle2 == 370:
               angle2 = 0
               r = r + 5              
             

    
    pygame.draw.arc(sc, (255, 255, 255), (100+r, 50+r, r, r), ((angle1+90)/57), ((angle2+90)/57), 1*r)
    pygame.display.flip()

pygame.quit()