int  A = 3, B = 2;

void setup()
{
  size(500, 500, P3D);
  frameRate(25);
  textFont(createFont("Helvetica", 8, true));
  textMode(SCREEN);
}

void mousePressed()
{
  A = (int) random(-10, 10);
  B = (int) random(-10, 10);
}

void draw()
{
  background(0, 31, 31);
  translate(width / 2, height / 2);

  for (int z = -1000; z < 500; z += 15)
  {
    float  r    = sin(radians(frameCount));
    float  xoff =  width / 4 * sin(A * radians(z / 15 + frameCount) + PI / 2),
           yoff = height / 4 * sin(B * radians(z / 15 + frameCount));

    stroke(255, map(z, -1000, 500, 0, 255));
    for (float a = 0; a < 2 * PI; a += PI / 32)
    {
      float  x =  width / 2 * sin(a + r),
             y = height / 2 * cos(a + r);

      point(xoff + x, yoff + y, z);
    }
  }
  text("A = " + A + ", B = " + B, 0, height);
}