int allOn(String args) {
  int firstCommaPosition = args.indexOf(",");
  int lastCommaPosition = args.lastIndexOf(",");

  int r = atoi(args.substring(0,firstCommaPosition));
  int g = atoi(args.substring(
                      firstCommaPosition+1,lastCommaPosition));
  int b = atoi(args.substring(lastCommaPosition+1));
  
  button.allLedsOn(r,g,b);
  return 1;
}
void loop() {
  int xVal = button.readX();
  int yVal = button.readY();
  int zVal = button.readZ();

  if ((abs (prevX - xVal) > threshold) || 
      (abs (prevY - yVal) > threshold) || 
      (abs (prevZ - zVal) > threshold)) {

        int r = abs(xVal) % 255;
        int g = abs(yVal) % 255;
        int b = abs(zVal) % 255;
        button.allLedsOn(r,g,b);
  }

  prevX = xVal;
  prevY = yVal;
  prevZ = zVal;  
}