save project

diy1.py

 # 利用write()帮助悟空给诺依回信吧~
 import turtle
 screen=turtle.Screen()
+len=screen.textinput('sb','sssssssb')
+a=int(len)
 screen.bgcolor("grey")
 pen=turtle.Pen()
 pen.penup()
@@ -10,12 +12,11 @@ pen.hideturtle()
 pen1=turtle.Pen()
 pen1.pensize(5)
 pen1.pencolor('black')
-len=50
 pen1.left(45)
-pen1.forward(2*len)
-pen1.circle(len,180)
+pen1.forward(2*a)
+pen1.circle(a,180)
 pen1.right(90)
-pen1.circle(len,180)
-pen1.forward(2*len)
+pen1.circle(a,180)
+pen1.forward(2*a)
 pen1.hideturtle()
 turtle.done()