save project

1.py

+import turtle
+pen=turtle.Pen()
+screen=turtle.Screen()
+len=screen.textinput("提示","输入⚪的半径")
+len=int(len)
+pen.fillcolor("red")
+pen.begin_fill()
+pen.left(45)
+pen.forward(len*2)
+pen.circle(len,180)
+pen.right(90)
+pen.circle(len,180)
+pen.forward(len*2)
+pen.end_fill()
+pen.done()
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