auto save

1.py

+import turtle
+pen=turtle.Pen()
+screen=turtle.Screen()
+screen.bgcolor("black")
+a=["red","yellow","blue","green"]
+pen.speed(100)
+for i in range(1,400):
+    pen.pencolor(a[i%4])
+    pen.forward(i)
+    pen.right(91)
+pen.hideturtle()
+turtle.done()