save project

my_tree.py

 import turtle
 import turtle
-
+import random
 pen = turtle.Turtle()
 pen = turtle.Turtle()
 pen.color('sienna')
 pen.color('sienna')
 # 画布大小
 # 画布大小
@@ -7,13 +7,18 @@ 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
-
+cl=["snow","pink"]
 pen.left(90)
 pen.left(90)
 pen.up()
 pen.up()
 pen.backward(150)    # 后退
 pen.backward(150)    # 后退
 pen.down()
 pen.down()
 def t(n):
 def t(n):
     if n>0:
     if n>0:
+        if n>5:
+            c=random.choice(cl)
+            pen.color(c)
+        else:
+            pen.color('sienna') 
         pen.forward(n)
         pen.forward(n)
         pen.right(30)
         pen.right(30)
         t(n-10)
         t(n-10)