void Gameboard::draw()
{
    for(int y=0;y<MAXYLINES;y++)
    {
        for(int x=0;x<MAXXLINES;x++)
        {
            if(board[y * MAXXLINES + x] > 0)
            {
                SDL_Rect rect = {BOARDX+x*STONEW,BOARDY+y*STONEH,BOARDX+((x+1)*STONEW),BOARDY+((y+1)*STONEH)};//Error in formula

                SDL_FillRect(Tetris::screen,&rect,SDL_MapRGB(Tetris::screen->format,255,255,255));
            }
        }
    }
}