save project

lll.py

@@ -13,11 +13,13 @@ screen.bgcolor("light blue")
 pen1=turtle.pen()
 pen1=turtle.pen()
 pen1.pencolor("red")
 pen1.pencolor("red")
 pen1.pensize(5)
 pen1.pensize(5)
+#借助变量
+len=60
 pen1.left(45)
 pen1.left(45)
-pen1.forward(100)
-pen1.circle(50,180)
+pen1.forward(2*len)
+pen1.circle(len,180)
 pen1.right(90)
 pen1.right(90)
-pen1.circle(50,180)
-pen1.forward(100)
+pen1.circle(len,180)
+pen1.forward(2*len)
 pen1.hideturtle()
 pen1.hideturtle()
 turtle.done()
 turtle.done()
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