About Set application.
This is variation of the original Set card game. In this variation it is not necessary to identify all possible Sets in 12 cards,
just one at the time. Here is how Set is defined: Each card has four features (dimensions): number of shapes(1, 2, or 3); shape (diamond, squiggle, or oval);
shading (solid, shaded, or open); and color (red, green or blue). A "set" consists of 3 cards on which each feature (taken separately) is either the same on all 3 cards,
or different on all 3 cards. The object of this game is to identify "sets" of 3 cards by clicking on them as fast as possible. As soon as three cards selected form Set - they will be
removed and replaced with fresh ones from the deck. Total number of cards is 81. When all cards are used and cards on the screen do not have Sets - game ends, timer sops.
