My code starts with:

1. import processing.opengl.*;
2. float a;
3.        
4. void setup() {
5.   size(500, 500, OPENGL);
6.   fill(#F6D81E);
7.   noStroke();
8.  
9. }

I have a 2D object wich I rotate with

1. void draw() {
2.   background(90);
3.   translate(width/2, height/2);
4.   rotateX(a);
5.   rotateY(a*5);
6.   rotateX(PI/5);

This is my object:

1.   rect(20, 20, 20, 20);
     rect(20, 20, 20, 20);
   

And then I want a little spotlight that moves around the scene. Is that possible? I tried

1. Set the view transform Push the matrix stack Set the model transform to update the light’s position Set the light position //glLightfv(GL_LIGHT_POSITION,…) Pop the matrix stack Send down the scene or model geometry Swap buffers.

But that didn`t worked. Any help would be great!

Thanks in advance :)