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# snow
import pippy
import pygame
import sys
from pygame.locals import *
from random import *
# always need to init first thing
pygame.init()
# create the window and keep track of the surface
# for drawing into
screen = pygame.display.set_mode()
# ask for screen's width and height
width, height = screen.get_size()
# turn off the cursor
pygame.mouse.set_visible(False)
bg_color = (0, 0, 0)
xs = []
ys = []
dxs = []
dys = []
sizes = []
nflakes = 1000
while pippy.pygame.next_frame():
# if we don't have enough flakes, add one
if len(xs) < nflakes:
xs.append(randint(0, width))
ys.append(0)
dxs.append(randint(-2, 2))
size = expovariate(1) * 5
sizes.append(int(size))
dys.append(size * 2)
# clear the screen
screen.fill(bg_color)
for event in pygame.event.get():
if event.type == QUIT:
sys.exit()
elif event.type == KEYDOWN:
if event.key == K_ESCAPE:
sys.exit()
for x, y, size in zip(xs, ys, sizes):
c = 40 + int(float(y) / height * 215)
pygame.draw.circle(
screen, (c, c, c), (x, y), size)
xs_ = []
ys_ = []
dxs_ = []
dys_ = []
sizes_ = []
for x, y, dx, dy, size in zip(xs, ys, dxs, dys, sizes):
if 0 <= x + dx <= width and 0 <= y + dy <= height:
xs_.append(x + dx)
ys_.append(y + int(dy))
dxs_.append(dx)
dys_.append(dy)
sizes_.append(size)
xs = xs_
ys = ys_
dxs = dxs_
dys = dys_
sizes = sizes_
pygame.display.flip()
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