save project

my_tree.py

@@ -7,22 +7,22 @@ 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.backward(150)    # 后退
-pen.down()
-pen.forward(100)
-pen.right(30)
-pen.forward(50)
-pen.up()
-pen.forward(-50)
-pen.left(60)
 pen.down()
 pen.down()
-pen.forward(50)
-pen.up()
-pen.forward(-50)
-pen.right(30)
-pen.forward(-100)
+pen.backward(100)    # 后退
+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()
+tree(100)
 
 
 
 
 turtle.done()
 turtle.done()