save project

diy1.py

+import turtle
+pen=turtle.Pen()
+screen=turtle.Screen()
+screen.bgcolor("black")
+ys=["red","orange","yellow","green"]
+
+
+for i in range(1,300):
+    pen.pencolor(ys[i%4])
+    pen.forward(i)
+    i+=1
+    pen.right(91)
+pen.hideturtle()
+turtle.done()