save project

diy1.py

@@ -4,9 +4,13 @@
 """
 import turtle
 pen = turtle.Pen()
+colors=["red","orange","yellow","green"]
+screen=turtle.Screen()
 # 请创造师在下面接着创作
 pen.speed(100)
 for i in range(1,301):
+    pen.pencolor(colors[i%4])
+    screen.bgcolor("black")
     pen.forward(i)
     i+=1
     pen.right(91)