save project

d2.py

 import turtle
 import turtle
 pen = turtle.Pen()
 pen = turtle.Pen()
-x = 1
+ 
 pen.speed(100)
 pen.speed(100)
-for i in range(400):
-    pen.forward(x)
-    x+=1
+for i in range(1,400):
+    pen.forward(i)
+    
     pen.right(91)
     pen.right(91)
 pen.hideturtle()
 pen.hideturtle()
 turtle.done()    
 turtle.done()