save project

bug.py

 import turtle
 pen = turtle.Pen()
-distance=1
+screen=turtle.Screen()
+screen.bgcolor("black")
 pen.speed(0)
+color=["red","orange","yellow","green"]
 for i in range(300):
-    pen.forward(i)
-    distance+=1
+    pen.pencolor(color[i%4])
+    pen.forward(i)       
     pen.right(91)
-pen.hideturtle()
+pen.hideturtle
 turtle.done()
\ No newline at end of file