save project

diy1.py

@@ -6,8 +6,11 @@ import turtle
 
 pen = turtle.Pen()
 # 请创造师在下面接着创作
-
+screen=turtle.Screen()
+screen.bgcolor("black")
 for i in range(1,300):
+    c=["red","orange","yellow","green"]
+    pen.pencolor(c[i%4])
     pen.forward(i) 
     pen.right(91)