Fully customized blockscreens

The block screens are great but they could be better if we could fully customize them, that is, write ourselves the text and set the icon. I want to write block screens that are intensely personal so that I am less inclined to diregard them and more likely to get back to focus. I would write a block screen message such as:

“Focus [My Name], remember that you need to complete project X by date Y if you want to get promoted to position Z”.