I will try to help you as best as I can.
First of all, this is not CC(Computer craft), so, don't you dare to try and port some code etc. It is kind of similar, and a buch of stuff can be portet, yet still it is different in a way.
In order to have colored things on ya screen you may want to use... I belive tier 2 and up? But just in case, uset T3 screen and T3 gpu.
I will write a bunch of code, hope you will understand, but first a bit of syntax, so you aren't confused. Whenever I will use '---' without quotes, that means that everything after those three dashes is not a part of