save project

my_tree.py

@@ -14,7 +14,7 @@ pen.backward(150)    # 后退
 pen.down()
 pen.down()
 
 
 def tree(n):
 def tree(n):
-    if n >= 50:
+    if n >= 0:
         pen.forward(n)
         pen.forward(n)
         pen.right(30)
         pen.right(30)
         tree(n-10)
         tree(n-10)
@@ -25,5 +25,5 @@ def tree(n):
         pen.backward(n)
         pen.backward(n)
         pen.down()
         pen.down()
 
 
-tree(100)
+tree(60)
 turtle.done()
 turtle.done()