save project

diy1.py

@@ -4,7 +4,11 @@
 """
 """
 import turtle
 import turtle
 pen=turtle.Pen()
 pen=turtle.Pen()
+screen=turtle.Screen()
+screen.bgcolor("black")
+colors=["red","green","yellow","orange"]
 for i in range(3,300):
 for i in range(3,300):
+    pen.color(colors[i%4])
     pen.forward(i)
     pen.forward(i)
     pen.right(91)
     pen.right(91)
-turtle.dong()
+turtle.done()