Decades ago I requested in developer forums a writers program that had only a background pix on the screen, and that everything in the window was customizable.. About 8-months later out came 'knock yer socks off' 'FocusWriter'...

You can install FocusWriter with Synaptic or Software Manager..

You can change all the colors to taste, and opaqueness, sizes, borders, margins, everything, even the tool bars configurations.. You can add background pix from your pix library in a flash...
The software creator hasn't missed a single feature...
You can set the background pix to be who you are writing to or about... It's good for science writing or script writing, in that you can have the background pix of the person, subject, invention, or science item you're writing about, to maintain your focus.. Everything is customizable.. FocusWriter is built on a 'god-class scale' of software writing.. I can't say enough good about FocusWriter... I just wish he and his team would write a Linux distro.. It would probably become the best of the best...