As I said in May 2016 (yes, it's been a long time), here is the code of my monitoring tool, written in BASH.
This tool was created to have fun with Metal3d's simple_curses : https://github.com/metal3d/bashsimplecurses
Of course, it is not intended to be a real monitoring tool, because it has not been coded for that purpose.
But if you have not very important machines, or already monitored but you want a click display, then this trick is for you ! :)
Have fun.