Each player takes it in turn to throw the dice.  They roll and continue to roll the dice until they throw a 7.  They score the sum of all the numbers thrown before the 7.  Players announce there tally after every throw and once they have thrown a 7 their score is noted on the score sheet.  Doubles score double the value.  For example: 4,4 making 8, scores 16. The player who scores a pre-arranged total of say, 500 or 1000, is the winner.