What is the dominoes game where you try to build houses?

what is the dominoes game where you score by building houses. what i nmean by houses is not building them with the dominoes but when you scire a multiple of 5 you get a slash, you try to make a large x and then on each of the 4 sides of the large x you try to make a small x inside of it. you get a slash for every 5 points so basically 10pts is an x. you play to say 5 houses or something like thtWhat is the dominoes game where you try to build houses?
bones