Also on the table is a copy of Hansard and where the clerk and deputy clerk sit. The clerk needs to know all the rules of Parliament and is responsible for ringing the bells during a division (voting). In front of the clerk are the hour glasses. The outer glasses measure four minutes and the middle glass measures one minute. These glasses are turned when there is a division; one of the four-minute glasses is turned and the bells will ring and the clocks will flash green for the House of Representatives or red for the Senate for four minutes. After the hourglass stops, the house's attendants will lock the doors and the whips will count the votes. Members vote by either moving to the government side of the house for a vote for a bill or the opposition side for a vote against a bill. If there are successive divisions, and there is no debate after the first division, the middle one-minute hourglasses are turned and the bells are rung for one minute.