colors[0] = "1.0 0.0 0.0 1.0";
colors[1] = "1.0 0.0 0.0 1.0";
colors[2] = "1.0 0.0 0.0 0.0";
sizes[0] = 0.1;
sizes[1] = 0.1;
sizes[2] = 0.1;
times[0] = 0.0;
times[1] = 0.5;
times[2] = 1.0;
Basically when the particle starts it'll go though the [
.0] catagory.
Using Muffinmix's example this would mean that a red particle would go on from times[1] and times[2] and would be size 0.1. Then in the [1] catagory it would stay the same color of red and stay the same size until times[2] when it'll be black, stay the same size, and end.
Heres a picture for you.