The classical connect-4 game is played on a 67 board, it can in fact be played in any nrRowsnrCols board. In your implementation, the user will specify the number of rows nrRows and the number of columns nrCols. A win is obtained if a player has four consecutive pieces in a row, column, or diagonal.

Your program should implement the game for two human players. Extra credit, up to 20 points, will be given for the design of the graphical interface. You could enhance your graphics by using sounds as well.