from turtle import Turtle,Screen

screen = Screen()
screen.setup(width=0.3, height=0.5, startx=900, starty=0)
sonali = Turtle()
sonali.pen()
sonali.shape("turtle")
sonali.color("green")
sonali.forward(100)
sonali.left(90)
sonali.forward(100)
sonali.left(90)
sonali.forward(100)
sonali.left(90)
sonali.forward(100)

screen.exitonclick(),