save project

my_tree.py

@@ -7,14 +7,15 @@ 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.left(90)
 pen.up()
 pen.up()
 pen.backward(150)    # 后退
 pen.backward(150)    # 后退
 pen.down()
 pen.down()
-pen.forward(100)
-pen.right(30)
-pen.forward(50)
-pen.forward(-50)
-pen.left(60)
-pen.forward(50)
+def t(n):
+    pen.forward(n)
+    pen.right(30)
+    t(n-10)
+    pen.left(60)
+    t(n-10)
 turtle.done()
 turtle.done()