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• Calculator

from kandinsky import get_pixel, set_pixel,fill_rect
from random import random, randint
from math import log
import turtle

fill_rect(0, 0, 320, 222, (0,105,105))

for l in range(222):
 y = l
 for x in range(320):
  y += 2*random()-1
  c = min(255, get_pixel(x,int(y))[1] + 50)
  set_pixel(x,int(y),(0,c,c))

t = turtle
t.pendown()
t.color((255,0,0))
t.pensize(2)

while True:
 (x, y) = t.position()
 if x*x + y*y > 6400:
  t.penup()
  t.goto(0,0)
  t.pendown()
  cc = int(100+155*random())
  t.color((255,cc,0))
 else:
  t.setheading(randint(0,359))
  t.fd(-log(random())/.1)