Dominos has been able to leverage its reputation for delivering pizza in record time as a way to generate buzz around its other products. It has also been able to boost ecommerce sales on Valentine’s Day, which is typically one of the company’s biggest online sales days. The first domino set was developed in the mid-18th century, and it may have come from either Italy or France. Since then, dominoes have become a generic gaming device that can be used for a variety of games. They are played in many different ways, and each game has its own rules. Whenever a domino is played, it must be placed edge to edge with another domino, or a tile that can be played on its face. The act of placing a domino is called making the “set,” and the first player to make the set begins play in the game. This player is the leader. The word “down” is also used to describe the domino that is played on top of the leader. When a player cannot play a domino, he or she must knock (or rap) the table and pass the turn to the next player. Usually, the player who knocks must wait until the line of play has reached a point where no other players can proceed, but this is not always the case in some games. A player may draw additional tiles from the stock in order to play a domino, but this must be done according to the rules of the specific game. Some games allow a certain number of doubles to be bought from the stock, and others require that each player draws a limited number of doubles for every hand or game. There are many ways to score in a domino game, but most scoring methods involve counting the total number of pips on all the tiles in the losing players’ hands at the end of the hand or game. Sometimes, a player must count the ends of a double, and sometimes it is necessary to count the sides of a double (i.e., 4-4 counts as only four points). In some games, a domino can be considered to be a “spinner” when it can be played on all four sides. This is important for some types of scoring, and it can change the way that a game is played. Lily Hevesh, a 20-year-old artist who creates spectacular domino setups, follows a sort of engineering-design process when creating her mind-blowing creations. She considers the theme or purpose of her work, brainstorms images and words that might go with it, and then determines how she will use a particular set of dominoes to accomplish it. She has designed sets for movies, television shows, and events, and her YouTube channel has more than 2 million subscribers. Her designs range from straight lines and curved lines to grids that form pictures when they fall, to 3D structures like towers and pyramids.