save project

my_tree.py

 import turtle
-
-pen = turtle.Turtle()
-pen.color('sienna')
-pen.speed(0)
-w = turtle.Screen()
-w.bgcolor('wheat')      # wheat小麦
-pen.left(90)
-pen.up()
-pen.backward(150)    # 后退
-pen.down()
+import random
 
 def tree(n):
-    if n >= 50:
+    if n>=0:
         pen.forward(n)
         pen.right(30)
         tree(n-50)
@@ -22,5 +13,16 @@ def tree(n):
         pen.backward(n)
         pen.down()
 
-tree(100)
+pen = turtle.Turtle()
+pen.color('sienna')
+pen.speed(0)
+w = turtle.Screen()
+w.bgcolor('wheat')      # wheat小麦
+pen.left(90)
+pen.up()
+pen.backward(150)    # 后退
+pen.down()
+
+
+tree(60)
 turtle.done()
\ No newline at end of file