auto save

demo.py

+import turtle
+pen = turtle.Pen()
+screen = turtle.Screen()
+screen.bgcolor("light pink")
+colors = ["black","blue","green","orange"]
+pen.speed(1000)
+dinstance = 1
+for i in range(1,300):
+    dinstance += 1
+    pen.forward(dinstance)
+    pen.pencolor(colors[i%4])
+    pen.right(91)
+pen.hideturtle()
+turtle.done()
+