用两种方法（普通方法和循环方法）绘制楼梯

'''
本期用turtle绘制个楼梯，先用最简单的方法绘制，之后在用循环绘制
'''
from turtle import *
pensize(5)
title('绘制楼梯')
color('blue')
forward(40)
left(90)
forward(40)
right(90)
forward(40)


left(90)
forward(40)
right(90)
forward(40)


left(90)
forward(40)
right(90)
forward(40)

from turtle import *
title('用循环绘制楼梯')

color('blue')
pensize(5)

for i in range(6):#几级台阶几个循环
    forward(40)
    left(90)
    forward(40)
    right(90)