import pygame
import random
import math

WIDTH = 500
HEIGHT = 500

pygame.init()
screen = pygame.display.set_mode((WIDTH, HEIGHT))
running = True

def draw_dotted_line(x_start,y,len_line,cnt):
 x = random.randint(1,100)
 for i in range(0,cnt):
  pygame.draw.line(screen,(255,255,255), [x,y], [x+len_line, y], 3)
  x = x + random.randint(1,100)*2
state = 0
while running:
    
    for event in pygame.event.get():
    
        
        if event.type == pygame.QUIT:
            running = False   
        if event.type == pygame.KEYDOWN:
         if event.key == pygame.K_RETURN:
           pygame.image.save(screen, "image.jpg")

    if state == 0:
     for i in range(0,500,10):
      draw_dotted_line(0,i,10,20)
     state = 1
     pygame.display.flip()
pygame.quit()