import turtle

turtle.forward(100)
turtle.right(90)
turtle.forward(100)
turtle.right(90)

turtle.forward(90)
turtle.right(90)
turtle.forward(90)

turtle.right(90)
turtle.forward(80)
turtle.right(90)
turtle.forward(80)

turtle.right(90)
turtle.forward(70)
turtle.right(90)
turtle.forward(70)

turtle.right(90)
turtle.forward(60)
turtle.right(90)
turtle.forward(60)

turtle.right(90)
turtle.forward(50)
turtle.right(90)
turtle.forward(50)

turtle.right(90)
turtle.forward(40)
turtle.right(90)
turtle.forward(40)

turtle.right(90)
turtle.forward(30)
turtle.right(90)
turtle.forward(30)

turtle.right(90)
turtle.forward(20)
turtle.right(90)
turtle.forward(20)

turtle.right(90)
turtle.forward(10)
turtle.right(90)
turtle.forward(10)

turtle.right(90)
turtle.forward(5)
turtle.right(90)
turtle.forward(5)