save project

diy1.py

@@ -5,12 +5,16 @@
 import turtle
 
 pen = turtle.Pen()
+screen=turtle.Screen()
+screen.bgcolor("black")
 pen.speed(100)
+colors=["red","purple","pink","blue"]
 # 请创造师在下面接着创作
 
 for i in range(1,300):
     pen.forward(i)
-    pen.right(89)
+    pen.color(colors[i%4])
+    pen.right(91)
 # 隐藏画笔，保存画布
 pen.hideturtle()
 turtle.done()
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