How to add Lightbox

[smithy]

hi there! does any body know how to add lightbox code to a website? iv'e tried and tried and nothing works. thanks

www.photomedia24.com

 

[smithy]

any answers?
Morphing modal overlay <-- this is what i need just a button on my page, but evertime i add it, it seems to mess up the page due to css

https://codepen.io/search/pens?q=morphing+modal+overlay