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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 
-
+import random
 pen=turtle.Pen()
 screen=turtle.Screen()
-pen.speed('fast')
+pen.speed('fastest')
 pen.hideturtle()
 screen.bgcolor('black')
 
 i=0
-while i<135:
-    pen.pencolor('pink')
+while i<200:
+    a=random.choice("black","blue","green","orange")
+    pen.pencolor(a)
     pen.penup()
     pen.goto(0,0)
     pen.forward(200)
@@ -17,5 +18,5 @@ while i<135:
     pen.circle(100)
     pen.left(2)
     i+=1
-
+speed(100)
 turtle.done()
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