import pygame,sys
import math
pygame.init()
screen = pygame.display.set_mode([640,480])
screen.fill([249,204,226])
for x in range(0,640):
    y = int(math.sin(x/640.0*4*math.pi)*200+240)
    pygame.draw.rect(screen,[0,0,0],[x,y,1,1],1)
pygame.display.flip()
while True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            sys.exit()