import turtle

a = turtle.Pen()
b = turtle.Pen()
c = turtle.Pen()
d = turtle.Pen()


a.forward(150)
a.right(90)
a.forward(30)
a.left(90)
a.forward(20)


b.forward(150)
b.right(90)
b.forward(60)
b.left(90)
b.forward(40)

c.forward(150)
c.left(90)
c.forward(30)
c.right(90)
c.forward(20)


d.forward(150)
d.left(90)
d.forward(60)
d.right(90)
d.forward(40)


turtle.done()