save project

IUn.py

+import turtle
+pen = turtle.Pen()
+screen=turtle.Screen()
+screen.bgcolor("back")
+colors=["red","orange","yellow","green"]
+for i in range(1,300):
+    pen.forward(i)
+    pen.pencolor(colors[i%4])
+    pen.right(91)
+
+turtle.done
\ No newline at end of file