save project

my_tree.py

@@ -6,6 +6,12 @@ pen.color('sienna')
 w = turtle.Screen()
 w.bgcolor('wheat')      # wheat小麦
 
+def tree(n):
+    pen.forward(n)
+    pen.up()
+    pen.backward(n)
+    pen.down()
+
 # 移动到起点
 pen.left(90)
 pen.up()
@@ -14,18 +20,10 @@ pen.down()
 pen.forward(100)
 
 pen.right(30)
-pen.forward(50)
-
-pen.up()
-pen.backward(50)
-pen.down()
+tree(50)
 
 pen.left(60)
-pen.forward(50)
-
-pen.up()
-pen.backward(50)
+tree(50)
 pen.right(30)
 pen.backward(100)
-pen.down()
 turtle.done()