private boolean ant_is_alive(int id, Colour col){
		boolean found = false;
		int x = 0;
		int y = 0;
		while(x < world.getRows() && !found){
			while(y < world.getColumns() && !found){
				Cell c = world.getCell(x,y);
				if(c.isAnt()){
					if(c.getAnt().getId()==id && c.getAnt().getColour()==col){
						found = true;
					}
				}
				y++;
			}
			y = 0;
			x++;
		}
		return found;
	}