save project

my_tree.py

@@ -18,14 +18,15 @@ def tree(n):
         length=1.5*random.random()
         tree(n-10*length)
         pen.left(60*angle)
-        tree(n-length)
-        pen.right(angle)
+        tree(n-10*length)
+        pen.right(30*angle)
         pen.up()
         pen.backward(n)
         pen.down()
 
 pen = turtle.Turtle()
 pen.color('sienna')
+pen.speed(0)
 # 画布大小
 w = turtle.Screen()
 w.bgcolor('wheat')      # wheat小麦