用python程序来画花

 from turtle import *
 import time

 setup(600,800,0,0)
 speed(0)
 penup()
 seth(90)
 fd(340)
 seth(0)
 pendown()

 speed(5)
 begin_fill()
 fillcolor('red')
 circle(50,30)

 for i in range(10):
     fd(1)
     left(10)

 circle(40,40)

 for i in range(6):
     fd(1)
     left(3)

 circle(80,40)

 for i in range(20):
     fd(0.5)
     left(5)

 circle(80,45)

 for i in range(10):
     fd(2)
     left(1)

 circle(80,25)

 for i in range(20):
     fd(1)
     left(4)

 circle(50,50)

 time.sleep(0.1)

 circle(120,55)

 speed(0)

 seth(-90)
 fd(70)

 right(150)
 fd(20)

 left(140)
 circle(140,90)

 left(30)
 circle(160,100)

 left(130)
 fd(25)

 penup()
 right(150)
 circle(40,80)
 pendown()

 left(115)
 fd(60)

 penup()
 left(180)
 fd(60)
 pendown()

 end_fill()

 right(120)
 circle(-50,50)
 circle(-20,90)

 speed(1)
 fd(75)

 speed(0)
 circle(90,110)

 penup()
 left(162)
 fd(185)
 left(170)
 pendown()
 circle(200,10)
 circle(100,40)
 circle(-52,115)
 left(20)
 circle(100,20)
 circle(300,20)
 speed(1)
 fd(250)

 penup()
 speed(0)
 left(180)
 fd(250)
 circle(-300,7)
 right(80)
 circle(200,5)
 pendown()

 left(60)
 begin_fill()
 fillcolor('green')
 circle(-80,100)
 right(90)
 fd(10)
 left(20)
 circle(-63,127)
 end_fill()

 penup()
 left(50)
 fd(20)
 left(180)

 pendown()
 circle(200,25)

 penup()
 right(150)

 fd(180)

 right(40)
 pendown()
 begin_fill()
 fillcolor('green')
 circle(-100,80)
 right(150)
 fd(10)
 left(60)
 circle(-80,98)
 end_fill()

 penup()
 left(60)
 fd(13)
 left(180)

 pendown()
 speed(1)
 circle(-200,23)

 exitonclick()

第二种

 import turtle
 import math

 def p_line(t, n, length, angle):
     """Draws n line segments."""
     for i in range(n):
         t.fd(length)
         t.lt(angle)

 def polygon(t, n, length):
     """Draws a polygon with n sides."""
     angle = 360 / n
     p_line(t, n, length, angle)

 def arc(t, r, angle):
     """Draws an arc with the given radius and angle."""
     arc_length = 2 * math.pi * r * abs(angle) / 360
     n = int(arc_length / 4) + 1
     step_length = arc_length / n
     step_angle = float(angle) / n

     # Before starting reduces, making a slight left turn.
     t.lt(step_angle / 2)
     p_line(t, n, step_length, step_angle)
     t.rt(step_angle / 2)

 def petal(t, r, angle):
     """Draws a 花瓣 using two arcs."""
     for i in range(2):
         arc(t, r, angle)
         t.lt(180 - angle)

 def flower(t, n, r, angle, p):
     """Draws a flower with n petals."""
     for i in range(n):
         petal(t, r, angle)
         t.lt(p / n)

 def leaf(t, r, angle, p):
     """Draws a 叶子 and fill it."""
     t.begin_fill()  # Begin the fill process.
     t.down()
     flower(t, 1, r, angle, p)
     t.end_fill()

 def main():
     window = turtle.Screen()  # creat a screen
     window.bgcolor("white")
     window.title("draw a flower")
     lucy = turtle.Turtle()
     lucy.shape("turtle")
     lucy.color("red")
     lucy.width(3)
     # lucy.speed(10)

     # Drawing flower
     flower(lucy, 7, 60, 100, 360)

     # Drawing pedicel
     lucy.color("brown")
     lucy.rt(90)
     lucy.fd(200)

     # Drawing leaf 1
     lucy.width(1)
     lucy.rt(270)
     lucy.color("green")
     leaf(lucy, 40, 80, 180)
     lucy.rt(140)
     lucy.color("black")
     lucy.fd(30)
     lucy.lt(180)
     lucy.fd(30)

     # Drawing leaf 2
     lucy.rt(120)
     lucy.color("green")
     leaf(lucy, 40, 80, 180)
     lucy.color("black")
     lucy.rt(140)
     lucy.fd(30)
     lucy.ht()  # hideturtle
     window.exitonclick()

 main()

效果图：