save project

my_tree.py

@@ -11,7 +11,7 @@ pen.left(90)
 pen.up()
 pen.backward(150)    # 后退
 pen.down()
-
+pen.speed(10)
 def tree(n):
     if n >=50:
         pen.forward(n)
@@ -25,7 +25,7 @@ def tree(n):
         pen.down()
 
 
-tree(100)
+tree(80)
 
 
 turtle.done()