save project

my_tree.py

 import turtle
+import random
 
 pen = turtle.Turtle()
 pen.color('sienna')
-# 画布大小
-w = turtle.Screen()
+w = turtle.Screen
 w.bgcolor('wheat')      # wheat小麦
 def tree(n):
-    if n>=50:
-        pen.forward(n)
-        pen.right(30)
-        tree(n-10)
-        pen.left(30)
-        pen.left(30)
-        tree(n-10)
-        pen.right(30)
-        pen.up()
-        pen.backward(n)
-        pen.down()
+    if n>=0:
+        if n<=12:
+            color_list = ["snow","lightcoral"]
+            pen.color(snow)
+            pen.pensize(n/3)
+            pen.pensize(n/10)
+            pen.forward(n)
+            angle = random.randint(0,30)
+            erttg = random.randint(0,30)
+            pen.right(angle)
+            tree(n-erttg)
+            pen.left(2*angle)
+            tree(n-erttg)
+            pen.right(angle)
+            pen.up()
+            pen.backward(n)
+            pen.down()
 # 移动到起点
 pen.left(90)
 pen.up()