save project

my_tree.py

@@ -5,12 +5,18 @@ def draw():
     pen.fd(i)
     pen.right(y)
     pen.fd(i/2)
-    pen.fd(i/2*-1)
+    pen.up()
+    pen.bk(i/2)
+    pen.down()
     pen.left(y*2)
     pen.fd(i/2)
-    pen.fd(i/2*-1)
+    pen.up()
+    pen.bk(i/2)
+    pen.down()
     pen.right(y)
-    pen.fd(i*-1)
+    pen.up()
+    pen.bk(i)
+    pen.down()
 pen = turtle.Turtle()
 pen.color('sienna')
 pen.pensize(2.5)