@Override protected void invalidated() {
                    getMovingAverage().setPeriod(get());
                    fireTileEvent(AVERAGING_EVENT);
                }
Defines the number values that should be used for
the averaging of values. The value must be in the
range of 1 - 1000.
@param PERIOD
src/main/java/eu/hansolo/tilesfx/Tile.java