save project

my_tree.py

@@ -4,24 +4,23 @@ pen = turtle.Turtle()
 pen.color('sienna')
 pen.color('sienna')
 # 画布大小
 # 画布大小
 w = turtle.Screen()
 w = turtle.Screen()
-w.bgcolor('wheat')      # wheat小
+w.bgcolor('wheat')      # wheat小麦
 
 
 # 移动到起点
 # 移动到起点
-def tree(n):
-    if n>=0:
-        pen.forward(n)
-        pen.right(30)
-        tree(n-30)
-        pen.left(60)
-        tree(n-30)
-        pen.right(30)
-        pen.up()
-        pen.backward(n)
-        pen.down()
 pen.left(90)
 pen.left(90)
 pen.up()
 pen.up()
-pen.backward(150)
+pen.backward(150)    # 后退
 pen.down()
 pen.down()
-tree(100)
-
+pen.forward(100)
+pen.right(30)
+pen.forward(50)
+pen.up()
+pen.backward(50)
+pen.down()
+pen.left(60)
+pen.forward(50)
+pen.up()
+pen.backward(50)
+pen.right(30)
+pen.backward(100)
 turtle.done()
 turtle.done()
\ No newline at end of file