save project

my_tree.py

 import turtle
 
 pen = turtle.Turtle()
+pen.left(90)
+pen.up()
+pen.backward(150)    # 后退
+pen.down()
+pen.pensize(7)
+pen.speed(1)
+
+def tree(n):
+    if n>=50:
+        pen.forward(n)
+        pen.right(30)
+        tree(n-10)
+        pen.left(60)
+        tree(n-10)
+        pen.right(30)
+        pen.up()
+        pen.backward(n)
+        pen.down()
+
+
 pen.color('sienna')
 # 画布大小
 w = turtle.Screen()
-w.bgcolor('wheat')      # wheat小麦
-
+w.bgcolor('wheat')  
+tree(100)    # wheat小麦
+'''
 # 移动到起点
 pen.left(90)
 pen.up()
@@ -23,5 +44,5 @@ pen.left(60)
 pen.forward(50)
 pen.penup()
 
-
+'''
 turtle.done()