auto save

diy1.py

+import turtle
+pen=turtle.Pen()
+screen=turtle.Screen()
+screen.bgcolor('black')
+a=['red','orange','yellow','green']
+for i in range(1,301,1):
+    pen.color(a[i%4])
+    pen.forward(i)
+    pen.right(91) 
+pen.hideturtle()
+turtle.done()
+