import turtle
t = turtle.Pen()

    t.forward(500)
    t.left(90)
    t.forward(100)
    t.left(90)
    t.forward(100)
    t.right(90)
    t.forward(100)
    t.left(90)
    t.forward(300)
    t.left(90)
    t.forward(100)
    t.right(90)
    t.forward(100)
    t.left(90)
    t.forward(100)
    t.up()
    t.forward(50)
    t.down()
    t.circle(50)
    t.setheading(0)
    t.up()
    t.forward(450)
    t.right(90)
    t.forward(50)
    t.setheading(0)
    t.down()
    t.circle(50)