（四）海龟绘图初试水

海龟绘图之坐标系问题

使用代码

>>> import turtle #导入turtle模块
>>> turtle.showturtle() #显示箭头
>>> turtle.write("你好,python") #写字符串
>>> turtle.forward(300) #前进300像素
>>> turtle.color("red") #画笔颜色改为red
>>> turtle.left(90) #箭头左转90度
>>> turtle.forward(300)
>>> turtle.goto(0,50) #取坐标（0，50）
>>> turtle.goto(0,0)
>>> turtle.penup() #抬笔
>>> turtle.goto(0,300)
>>> turtle.pendown() #落笔
>>> turtle.circle(100)

运行结果

海龟绘图之奥运五环

使用代码

#绘制奥运五环
import turtle

turtle.width(10)

turtle.color("blue")
turtle.circle(50)

turtle.penup()
turtle.goto(120,0)
turtle.pendown()
turtle.color("black")
turtle.circle(50)

turtle.penup()
turtle.goto(240,0)
turtle.pendown()
turtle.color("red")
turtle.circle(50)

turtle.penup()
turtle.goto(60,-50)
turtle.pendown()
turtle.color("yellow")
turtle.circle(50)

turtle.penup()
turtle.goto(180,-50)
turtle.pendown()
turtle.color("green")
turtle.circle(50)

运行截图