I'm very new to programming; I basically understand the concepts of how it works, but don't know the methods or the languages.
I'm wondering how advanced I would have to become at programming to create a program which could read text files, but display letters in defined colours. For example: The program would load a text file that says "Hello world" and display the words "Hello world" with every letter 'o' being blue, and every letter 'l' being red. I picked those colours at random for the example, but the idea would be that the program would allow you to select the colour to letter relationships yourself. Having to actually edit the code to change those relationships wouldn't bother me if I knew how to do it though.
From what I've read about programming, I can't imagine this would be an incredibly complex task.
Any advice on the subject? Know of an existing program that does this already? I need your help!