save project

my_tree.py

 import turtle
+import random
+
+def tree(n):
+    if n>=0:
+        pen.forward(n)
+        pen.right(30)
+        tree(n-10)
+        pen.lfet(60)
+        tree(n-10)
+        pen.right(30)
+        pen.up()
+        pen.backward(n)
+        pen.down()
+
 
 pen = turtle.Turtle()
+
 pen.color('sienna')
 # 画布大小
 w = turtle.Screen()