from turtle import *
def moveto(x,y):
    penup()
    goto(x,y)
    pendown()

def main():
    setup(800,600)
    speed(0)

    for radius in range(20,200,20):
        moveto(0,-radius)
        circle(radius)
    hideturtle()
    done()

if __name__=='__main__':
main()

from turtle import *
def moveto(x,y):
    penup()
    goto(x,y)
    pendown()

def main():
    setup(800,600)
    speed(0)

    for radius in range(180,0,-20):
        moveto(0,-radius)
        circle(radius)
    hideturtle()
    done()

if __name__=='__main__':
    main()

from turtle import*
def square(size=50,rgb='orange'):
    pencolor(rgb)
    for i in range(4):
        fd(size)
        left(90)

def main():
    setup(800,600)
    speed(0)

    for i in range(21):
        square(80)
        left(30)


    hideturtle()
    done()

if __name__=='__main__':
    main()

from turtle import *
setup(800,600)
pencolor('pink')
for i in range(10):
    for i in range(2):
        circle(80,90)
        left(90)

    right(36)
hideturtle()
done()

from turtle import*
speed(0)
setup(800,600)
bgcolor('white')

angle=0
size=2

for i in range(10):
    for j in range(4):
        fd(size)
        angle+=71
        seth(angle)
        size+=2

hideturtle()
done()

from turtle import *
from random import random

def rect(width,heigth,rgb):
    color(rgb)
    begin_fill()
    for i in range(2):
        fd(width)
        left(90)
        fd(heigth)
        left(90)
    fd(width)
    end_fill()

def main():
    setup(800,600)
    pen()
    speed(0)
    penup()
    goto(-200,-20)
    pendown()
    for i in range(20):
        rgb=tuple(random()for i in range(3))
        rect(20,40,rgb)

    hideturtle()
    done()

if __name__=="__main__":
    main()