diy1.py

import turtle

banjin=100
zhijin=banjin*2

pen=turtle.Pen()
pen.write("祝你生日快乐",font=("楷体",30,"normal")) 
pen.hideturtle()
screen=turtle.Screen()
screen.bgcolor("purple")

pen1=turtle.Pen()
pen1.penup()
pen1.goto(-100,0)
pen1.pendown()
pen1.pencolor("red")
pen1.pensize(3)
pen1.fillcolor("red")
pen1.begin_fill()
pen1.left(45)
pen1.forward(2*banjin)
pen1.circle(banjin,180)
pen1.right(90)
pen1.circle(banjin,180)
pen1.forward(2*banjin)
pen1.end_fill()
pen1.hideturtle()
turtle.done()