save project

diy1.py

@@ -8,7 +8,7 @@ c=["red","brown","blue","yellow"]
 index=0
 pen = turtle.Pen()
 sc=turtle.Screen()
-sc.bgcolor(black)
+sc.bgcolor("black")
 for i in range(1,301):
     pen.pencolor(c[index])
     pen.forward(i)