28. 使用 turtle 库函数绘制4个等距排列的正方形，边长为40像素，间距宽度为40。最左边的正方形左上角坐标为(0,0)。 import turtle n = __(1)__ for j in range(n): turtle. __(2)__ for i in range(4): turtle. __(3)__ turtle.right(__(4)__) turtle.penup() turtle.fd(__(5)__) turtle.done()

import turtle
n = 4
for j in range(n):
turtle.penup()
turtle.goto(j*80, 0)
turtle.pendown()
for i in range(4):
turtle.fd(40)
turtle.right(90)
turtle.penup()
turtle.fd(40)
turtle.done()