save project

diy1.py

@@ -5,8 +5,12 @@
 import turtle
 import turtle
 
 
 pen = turtle.Pen()
 pen = turtle.Pen()
+screen=turtle.Screen()
+screen.bgcolor("black")
+color=["red","yellow","green","orange"]
 i=1
 i=1
 for i in range(300):
 for i in range(300):
+    pen.pencolor(color[i%4])
     pen.forward(i)
     pen.forward(i)
     i+=1
     i+=1
     pen.right(91)
     pen.right(91)