circle(50) # 整圆;
circle(50,steps=3) # 三角形;
circle(120, 180) # 半圆

# coding=utf-8
import turtle
import time
# 同时设置pencolor=color1, fillcolor=color2
turtle.color("red", "yellow")
turtle.begin_fill()
for _ in range(50):
turtle.forward(200)
turtle.left(170)
turtle.end_fill()
turtle.mainloop()

# coding=utf-8
import turtle
import time
turtle.pensize(5)
turtle.pencolor("yellow")
turtle.fillcolor("red")
turtle.begin_fill()
for _ in range(5):
 turtle.forward(200)
 turtle.right(144)
turtle.end_fill()
time.sleep(2)
turtle.penup()
turtle.goto(-150,-120)
turtle.color("violet")
turtle.write("Done", font=('Arial', 40, 'normal'))
turtle.mainloop()

# coding=utf-8
import turtle
from datetime import *
# 抬起画笔，向前运动一段距离放下
def Skip(step):
 turtle.penup()
 turtle.forward(step)
 turtle.pendown()
def mkHand(name, length):
 # 注册Turtle形状，建立表针Turtle
 turtle.reset()
 Skip(-length * 0.1)
 # 开始记录多边形的顶点。当前的乌龟位置是多边形的第一个顶点。
 turtle.begin_poly()
 turtle.forward(length * 1.1)
 # 停止记录多边形的顶点。当前的乌龟位置是多边形的最后一个顶点。将与第一个顶点相连。
 turtle.end_poly()
 # 返回最后记录的多边形。
 handForm = turtle.get_poly()
 turtle.register_shape(name, handForm)
def Init():
 global secHand, minHand, hurHand, printer
 # 重置Turtle指向北
 turtle.mode("logo")
 # 建立三个表针Turtle并初始化
 mkHand("secHand", 135)
 mkHand("minHand", 125)
 mkHand("hurHand", 90)
 secHand = turtle.Turtle()
 secHand.shape("secHand")
 minHand = turtle.Turtle()
 minHand.shape("minHand")
 hurHand = turtle.Turtle()
 hurHand.shape("hurHand")
 for hand in secHand, minHand, hurHand:
  hand.shapesize(1, 1, 3)
  hand.speed(0)
 # 建立输出文字Turtle
 printer = turtle.Turtle()
 # 隐藏画笔的turtle形状
 printer.hideturtle()
 printer.penup()
def SetupClock(radius):
 # 建立表的外框
 turtle.reset()
 turtle.pensize(7)
 for i in range(60):
  Skip(radius)
  if i % 5 == 0:
   turtle.forward(20)
   Skip(-radius - 20)
   Skip(radius + 20)
   if i == 0:
    turtle.write(int(12), align="center", font=("Courier", 14, "bold"))
   elif i == 30:
    Skip(25)
    turtle.write(int(i/5), align="center", font=("Courier", 14, "bold"))
    Skip(-25)
   elif (i == 25 or i == 35):
    Skip(20)
    turtle.write(int(i/5), align="center", font=("Courier", 14, "bold"))
    Skip(-20)
   else:
    turtle.write(int(i/5), align="center", font=("Courier", 14, "bold"))
   Skip(-radius - 20)
  else:
   turtle.dot(5)
   Skip(-radius)
  turtle.right(6)
def Week(t): 
 week = ["星期一", "星期二", "星期三",
   "星期四", "星期五", "星期六", "星期日"]
 return week[t.weekday()]
def Date(t):
 y = t.year
 m = t.month
 d = t.day
 return "%s %d%d" % (y, m, d)
def Tick():
 # 绘制表针的动态显示
 t = datetime.today()
 second = t.second + t.microsecond * 0.000001
 minute = t.minute + second / 60.0
 hour = t.hour + minute / 60.0
 secHand.setheading(6 * second)
 minHand.setheading(6 * minute)
 hurHand.setheading(30 * hour)
 turtle.tracer(False)
 printer.forward(65)
 printer.write(Week(t), align="center",
     font=("Courier", 14, "bold"))
 printer.back(130)
 printer.write(Date(t), align="center",
     font=("Courier", 14, "bold"))
 printer.home()
 turtle.tracer(True)
 # 100ms后继续调用tick
 turtle.ontimer(Tick, 100)
def main():
 # 打开/关闭龟动画，并为更新图纸设置延迟。
 turtle.tracer(False)
 Init()
 SetupClock(160)
 turtle.tracer(True)
 Tick()
 turtle.mainloop()
if __name__ == "__main__":
 main()