I really like your 'shape-shifter'.

[lixinliang]

But, I want to let it become a Constructor so that I can create several canvas in one page and let my page look like more amusing. So I did a Constructor Plugin base on 'shape-shifter'. However, I rewrited lots code. And it's done. I open a new repository instead of forking from you (https://github.com/lixinliang/led). I hope you do not mind. Thanks a lot.