save project

star.py

 import turtle
 import turtle
+import random
+
 screen=turtle.Screen()
 screen=turtle.Screen()
 screen.bgcolor("green")
 screen.bgcolor("green")
 pen=turtle.Pen()
 pen=turtle.Pen()
@@ -7,13 +9,14 @@ pen.goto(100,-100)
 pen.write("诺一 用Python写电子\n贺卡真是太有趣啦\n ——悟空",font=("Times",13,"normal")) 
 pen.write("诺一 用Python写电子\n贺卡真是太有趣啦\n ——悟空",font=("Times",13,"normal")) 
 pen.hideturtle()
 pen.hideturtle()
 
 
+r = 100
 pen1=turtle.Pen()
 pen1=turtle.Pen()
 pen1.pensize(5)
 pen1.pensize(5)
 pen1.color("red")
 pen1.color("red")
 pen1.left(45)
 pen1.left(45)
-pen1.forward(100)
-pen1.circle(50,180)
+pen1.forward(2*r)
+pen1.circle(r,180)
 pen1.right(90)
 pen1.right(90)
-pen1.circle(50,180)
-pen1.forward(100)
+pen1.circle(r,180)
+pen1.forward(2*r)
 turtle.done()
 turtle.done()