save project

my_tree.py

@@ -4,7 +4,18 @@ 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小麦
+w.bgcolor('wheat')  
+
+def tree(n):
+    if n>=50:
+    pen. forward(n)
+    pen.right(30)
+    tree(n-10)
+    pen.up()
+    pen.left(60)
+    pen.backward(n)
+    pen.down()
+       # wheat小麦
 
 
 # 移动到起点
 # 移动到起点
 pen.left(90)
 pen.left(90)
@@ -26,3 +37,6 @@ turtle.right(30)
 turtle.forward(-100)
 turtle.forward(-100)
 turtle.done()
 turtle.done()
 
 
+tree(100)
+
+turtle.down()