python - turtle

import turtle
import time

t = turtle.Turtle()
s = turtle.Screen()

s.bgcolor("red")
t.pensize(5)
t.pencolor("blue")

t.speed(1)
t.forward(50)
t.left(90)
t.forward(50)
t.left(90)
t.forward(50)
t.left(90)
t.forward(50)
t.left(90)


time.sleep(2)