import turtle
t1 = turtle.Pen()
t2 = turtle.Pen()
t3 = turtle.Pen()
t4 = turtle.Pen()
t1.forward(100)
t1.left(90)
t1.forward(50)
t1.right(90)
t1.forward(50)
t2.forward(110)
t2.left(90)
t2.forward(25)
t2.right(90)
t2.forward(25)
t3.forward(110)
t3.right(90)
t3.forward(25)
t3.left(90)
t3.forward(25)
t4.forward(100)
t4.right(90)
t4.forward(50)
t4.left(90)
t4.forward(50)