public void wallIn() {
		if (mySpringies.getKey(JGEngine.KeyUp) & BoardSetup.wall_margin < mySpringies.pfHeight()/2) {
			for (Wall w : myBoardSetup.getWalls()) {
				w.remove();
			}
			BoardSetup.changeMargin(WALLCHANGE);
			myBoardSetup.setWalls(myEnvForces.getWallMags(), myEnvForces.getWallMags());
			mySpringies.clearKey(JGEngine.KeyUp);
		}
	}