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diy1.py

@@ -4,9 +4,13 @@
 """
 import turtle
 pen = turtle.Pen()
+screen = turtle.Screen()
+screen.bgcolor("black")
+colors = ["red","blue","orange","yellow"]
 pen.speed(50)
 # 请创造师在下面接着创作
 for i in range(1,300):
+    pen.pencolor(colors[i%4])
     pen.forward(i)
     pen.right(91)