save project

my_tree.py

 import turtle
 import turtle
+import random
 
 
 pen = turtle.Turtle()
 pen = turtle.Turtle()
 pen.color('sienna')
 pen.color('sienna')
@@ -12,8 +13,17 @@ pen.up()
 pen.backward(150)    # 后退
 pen.backward(150)    # 后退
 pen.down()
 pen.down()
 def tree(n):
 def tree(n):
-    if n >=50:
+    if n >=0:
+        if n <=12:
+            color_list = ['snow','red']
+            color=random.choice(color_list)
+            pen.color(color)
+            pen.pensize(n/3)
+        else:
+            pen.color('sienna')
+            pen.pensize(n/10)
         pen.forward(n)
         pen.forward(n)
+        angle=dandpm.dandpm
         pen.right(30)
         pen.right(30)
         tree(n-10)
         tree(n-10)
         pen.left(60)
         pen.left(60)