save project

my

+C:\Users\Administrator.USER-20190821UB\Desktop
+fils=open(p"C:\Users\P)
\ No newline at end of file

my_tree.py

 import turtle
+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()
+
+        
 
 pen = turtle.Turtle()
 pen.color('sienna')
@@ -11,13 +24,21 @@ pen.left(90)
 pen.up()
 pen.backward(150)    # 后退
 pen.down()
-pen.forward(100)
-pen.left(30)
-pen.forward(50)
-pen.backward(50)
-pen.right(60)
-pen.forward(50)
-pen.backward(50)
-pen.right(150)
-pen.forward(100)
+tree(80)
+# #画树
+# pen.forward(100)
+# #画左边的树枝并返回
+# pen.left(30)
+# pen.forward(50)
+# pen.backward(50)
+# pen.down()
+# #画右边树枝并返回
+
+# pen.right(60)
+# pen.forward(50)
+# pen.backward(50)
+# pen.right(150)
+# pen.forward(100)
+# pen.down()
+# #树枝返回
 turtle.done()