save project

diy1.py

@@ -6,7 +6,11 @@ import turtle
 
 
 pen = turtle.Pen()
 pen = turtle.Pen()
 # 请创造师在下面接着创作
 # 请创造师在下面接着创作
-for i in range(1,300):
+screen=turtle.Screen()
+screen.bgcolor("black")
+colors=["red","orange","yellow","green"]
+for i in range(0,299):
+    pen.pencolor(colors[i%4])
     pen.forward(i)
     pen.forward(i)
     i+=1
     i+=1
     pen.right(91)
     pen.right(91)