auto save

my_tree.py

 import turtle
 import turtle
-
+im
 def tree(n):
 def tree(n):
-    if tree>=50:
+    if n>=50:
         pen.forward(n)
         pen.forward(n)
         pen.right(30)
         pen.right(30)
-        tree(n-50)
+        tree(n-10)
         pen.left(60)
         pen.left(60)
-        tree(n-50)
+        tree(n-10)
         pen.right(30)
         pen.right(30)
         pen.up()
         pen.up()
         pen.backward(n)
         pen.backward(n)
@@ -18,5 +18,10 @@ w = turtle.Screen()
 w.bgcolor('wheat')      # wheat小麦
 w.bgcolor('wheat')      # wheat小麦
 
 
 # 移动到起点
 # 移动到起点
-
+pen.left(90)
+pen.up()
+pen.backward(150)    # 后退
+pen.down()
+pen.color("brown")
+tree(100)
 turtle.done()
 turtle.done()