一個open source的particle system
https://github.com/GymbylCoding/CBEffects
影片demo
討論區
裡面有很多preset可以用，像是基本的下雨或是下雪之類的
效果看起來還不錯，但是最驚人的是作者的網頁

Welcome to my website! I'm Caleb Place, the 14-year old person

14歲，他從12歲的時候開始coding

I code mostly in Lua with Corona SDK, but I also know C and C++, Java, HTML with CSS, JavaScript, PHP, a little Python, and a little Ruby. My (rather futile) goal is to learn every major (or other that I like) computer language that exists.

還會C/C++/JAVA/html/css/js/php/python/ruby

14歲差不多是國二的年紀
12歲差不多是小六，咦，跟我開始coding的年紀一樣
不過我那時候只會VB QQ