Drawing Planet

import turtle

t=turtle.Turtle()

s=turtle.Screen()

s.bgcolor('black')

t.pencolor('white')

a=0

b=0

t.speed(0)

t.penup()

t.goto(0,200)

t.pendown()

while True:

t.forward(a)

t.right(b)

a=a+1

b=b+1

if b==210:

break

t.hideturtle()

turtle.done()