A method, system and computer program product for improving accuracy and experience of a game. Signals are sent from a computer system to appropriate sensors based on a player's or game object's position to activate connected light-emitting fibers that are blended with grass on a playing field. The light-emitting fibers are activated in such a manner to display light to indicate an infraction (e.g., a player was in an offside position), a successful play (e.g., team made a first down), appropriate maneuvers, boundaries for a play, etc., thereby ensuring the game is fair and accurate and enhancing the experience of the game.