效果如图：

Python源代码：

from random import randint 
from time import sleep
import colorama
from colorama import Fore, Back, Style
colorama.init()
rnd2 = randint(1,60)
def gentree():
	for x in range(1,30,2):
		rnd1 = randint(1,rnd2)
		if x == 1:
			ch = "$"
		elif rnd1 % 4 == 0:
			ch =  "o"
		elif rnd1 % 3 == 0:
			ch = "j"
		elif rnd1 % 5 == 0:
			ch = "o"
		elif rnd1 % 7 == 0:
			ch = "j"
		else:
			ch ="*"
		if ch == "$":
			print(Fore.RED +"{:^33}".format(ch * x))
		elif ch == "o":
			print(Fore.RED +"{:^33}".format(ch * x))
		elif ch == "j":
			print(Fore.YELLOW +"{:^33}".format(ch * x))
		else:
			print(Fore.GREEN +"{:^33}".format(ch * x))
		
	print("{:^33}".format('|||'))
	print("{:^33}".format('|||')) 
	print("{:^33}".format('         Merry_christmas         '))
	sleep(.24)
gentree()

我试了一下，用IDLE运行这段代码效果不咋滴。为了让圣诞树一直在闪，我决定用批处理的方式，写一个bat脚本来运行py文件。

bat代码：

@echo off
D:
cd D:\Tree
:start 
python Tree.py
goto start

所以一共是两个文件：

环境参数：
Python == 3.6.1