def initial():
global t
t = Pen()
t.pensize(1)
t.pencolor('grey')
t.hideturtle()
t.penup()
for i in range(m + 1):
t.goto(point_y_up[i])
t.pendown()
t.goto(point_y_down[i])
t.penup()
for i in range(n + 1):
t.goto(point_x_le[i])
t.pendown()
t.goto(point_x_ri[i])
t.penup()
#!/usr.bin.env python
from time import sleep
from turtle import Pen, circle, right, pencolor, width
canvas = Pen()
colors = ["brown", "gray", "purple", "red"]
for num in xrange(450):
canvas.width(0.8)
canvas.pencolor(colors[num % 4])
canvas.circle(num)
canvas.right(91)
sleep(500)
from turtle import Pen
t=Pen()
colors=['red','blue','black','green']
for i in colors:
t.pencolor(i)
t.forward(100)
t.left(90)