save project

diy1.py

 # 悟空想海龟作图画出弹簧隧道，但是出现了bug，运行不了，请你帮助他，修改bug~
 import turtle 
-
 pen=turtle.Pen()
 screen=turtle.Screen()
 pen.speed('fast')
@@ -9,13 +8,14 @@ screen.bgcolor('black')
 
 i=0
 while i<135:
-    screen.pencolor('pink')
-    pen.penup()
-    pen.goto(0,0)
-    pen.forward(200)
-    pen.pendown()
-    screen.circle(100)
-    pen.left(2)
+    turtle.pencolor("pink")
+    turtle.penup()
+    turtle.goto(0,0)
+    
+    turtle.forward(200)
+    turtle.pendown()
+    turtle.circle(100)
+    turtle.left(2)
     i+=1
 
 turtle.done()
\ No newline at end of file