private void fixCannons(){

    	for (int xx = 0 ; xx < width ; xx++){
    		for (int yy = 0; yy < height; yy++){
    			if (getBlock(xx,yy) == 0){
	    			if (getBlock(xx,yy-1) == CANNON){
	    				setBlock(xx,yy,CustomizedLevel.CANNON_CONNECTOR);
	    			}
	    			if (getBlock(xx,yy-1) == CANNON_CONNECTOR || getBlock(xx,yy-1) ==  CANNON_POLE){
	    				setBlock(xx,yy,CustomizedLevel.CANNON_POLE);
	    			}
    			}
    		}
    	}
    }