Hi @omnia Here is the public link Webflow - livehelper-copy
You can play with that in read only mode as well as observe their properties. It is pretty simple actually.
About mix-it-up Livehelper public link is Webflow - livehelper
There is a discussion on previous post here http://forum.webflow.com/t/need-help-creating-a-portfolio-gallery-area-with-sorting-function/3646/3 Please read it first and do not hesitate to ask more if you need.
Cheers