void initPointLights() {
clearLights();
for (int i = 0; i < BALLSNUM; i++) {
PointLight light = new PointLight(
rayHandler, RAYS_PER_BALL, null, LIGHT_DISTANCE, 0f, 0f);
light.attachToBody(balls.get(i), RADIUS / 2f, RADIUS / 2f);
light.setColor(
MathUtils.random(),
MathUtils.random(),
MathUtils.random(),
1f);