I'd also recommend processing. But if you wanted to try your hand at GLSL you could also play around with shadertoy [1], though the learning curve is likely to

I'd also recommend processing. But if you wanted to try your hand at GLSL you could also play around with shadertoy [1], though the learning curve is likely to be much steeper. It has genuine demoscene heritage, coming from a talented demoscener named 'iq' [2]. [1] https://www.shadertoy.com/ https://www.shadertoy.com/ [2] http://www.iquilezles.org/apps/index.htm http://www.iquilezles.org/apps/index.htm