import turtle 
t = turtle.Pen() 
 
t.forward(75) 
t.left(140) 
t.forward(75) 
 
counter = 1 
while counter < 20: 
    t.forward(75) 
    t.left(140) 
    t.forward(75) 
    counter += 1 
    print(counter) 
 
turtle.done()