save project

fong che.py

 import turtle
+s=turtle.Screen()
+s.bgcolor("black")
+colors=["r","mediumorchid","gold","c"]
 p = turtle.Pen()
 p.speed(100)
-for b in range(1,300):
-    p.forward(b)
+for i in range(1,300):
+    p.color(coiors[i%4])
+    p.forward(i)
     p.right(91)
 # 隐藏画笔，保存画布
 p.hideturtle()