auto save

my_tree.py

@@ -7,8 +7,8 @@ def tree(n):
         a=random.randint(0,30)
         l=random.randint(1,15)
         c=random.choice(color)
-        pen.forward(n)
         
+        pen.forward(n)
         pen.right(a)
         tree(n-l)
         pen.left(2*a)
@@ -17,9 +17,9 @@ def tree(n):
         pen.up()
         pen.backward(n)    # 后退
         pen.down()
-        if l<=10:
+        if l<=12:
             pen.color(c)
-            pen.pensize(l/3)
+            pen.pensize(l/2)
         else:
             pen.color('sienna')
             pen.pensize(l/10)