mebrown26 on "Email collector/call to action with image?"

All I'm trying to do is create a call to action with name and email fields customized with my own images, like the following examples:
marieforleo.com (the black banner at the VERY bottom of the homepage)

OR

this pink box at the bottom of http://conniechapman.com/about/

I CANNOT find a plugin that does this, and I don't know coding enough to do one from scratch. Can I use z index to layer fields on top of an image? What are my options? It seems simple enough, but I'm stuck.

Thanks