import turtle

window = turtle.Screen()
window.bgcolor('black')
window.tracer(0, 1)
window.setup(500, 650)
window.setworldcoordinates(-250, -488, 250, 162)

pen = turtle.Turtle()
pen.color('green')
pen.pensize(3)
pen.speed(10)
pen.ht()


window.exitonclick()
