Python08-01_Practice：绘制不同颜色的多个同心圆

Practice：绘制不同颜色的多个同心圆

import turtle
t = turtle.Pen()

my_colors = ("red","green","purple","pink")

t.width(2)
t.speed(0)

for i in range(100):
    t.penup()
    t.goto(0,-i*10)
    t.pendown()
    t.color(my_colors[i%len(my_colors)])
    t.circle(15+i*10)
turtle.done()

 

 

 Practice：绘制棋盘

import turtle

t = turtle.Pen()
t.speed(0)
t.color("blue")
t.width(2)

for i in range(21):
    t.penup()
    t.goto(-300,300-30*i)
    t.pendown()
    t.goto(300,300-30*i)

for j in range(21):
    t.penup()
    t.goto((-300)+30*j,300)
    t.pendown()
    t.goto((-300)+30*j,-300)
turtle.done()