用Python绘制多个同心圆

代码示例：

import turtlet = turtle.Pen()my_colors = ("red","green","yellow","black")t.width(4)t.speed(1)for i in range(10): #0 1 2 3 4t.penup()t.goto(0,-i*10) #0, -100,-200,-300,-400t.pendown()t.color(my_colors[i%len(my_colors)])t.circle(15+i*10) #100,200,300, 400,, 500turtle.done() #程序执行完，窗口仍然在

结果展示：