Javascript Tennis Score Tracker

I’d like to create a simple interface with Javascript to keep track of the score during a game of tennis. It will require two on-screen buttons (one for each player) so that each time a player scores a point, they press their button to update the score on the screen. I will use a touchscreen, so the input method will essentially be a mouse click. Attached is an image of how the interface could look... - Current score at the top - Two large buttons for each player - Small button to undo last score (if a button was pressed by accident) - Small button to reset score to 0-0 A simple explanation of tennis scoring… Love (0 points), 15 (1 point), 30 (2 points), 40 (3 points), Game (winner). If both players get to 40 (3 points each) it's called Deuce (3-3). The next point is Advantage (to the player who scored it) and if the same player scores the next point then it's Game (winner). If the opponent scores the point, the score goes back to Deuce again. I'd also like it to use a selection of audio files (which I can provide) so that it can announce the score each time a button is pressed. Therefore it would need to be able to play two audio files relating to the score (eg: if the score was 15-30, it would need to play an audio file saying 'Fifteen' then another audio file saying 'Thirty') Please let me know if you have any questions.