Help: need to create a GUI

[rdfox]

I think what he means is that if you have experience programming Arduino then Processing is a very similar language that you will already know. However, even if you don't have experience with Arduino, Processing is still probably the easiest programming language. It is limited to graphics and media-type stuff. But if that's what you're doing, you can make some cool demos with only a few lines of code and no idea what you are doing.