At the beginning of the game every player takes one 'color code' card with the pattern he needs to win. Every player during his turn picks his top most colored triangle from his stack and places it in the central square area of the board, trying to reproduce his winning pattern. If the whole board contains visible triangles of just one color, then every player picks a new color code card. Winner is the person who has first completes the figure on his color code card. - BoardGameGeek