How to make Basketball scoreboard

How to make Basketball score board using micro controller
1. A four-in-one nixie tube is used to display the game time, the time format is: 15:00, and two three-in-one nixie tubes are used to display the score of the A and B teams, and the score format is: 008;
2. The game time is counted down by one second, and the default initial value is 15:00 (15 minutes) when powered on. When the game is not started, the "match time" can be added or subtracted by pressing the button, and cannot be modified after the game starts;
3. The score of teams A and B uses three digits. The initial value of power-on is 000, and the maximum value is 999, which meets the requirements of common sense. The score cannot be added or subtracted before the game starts or after the game is over;
4. This design adds a 24-second countdown function, which can be reset for 24 seconds at any time by pressing the button. If the 24-second violation is violated, the buzzer will start to alarm, and the game time will be suspended. After processing, press the 24-second reset button to continue the game;
5. Before the game starts, you can use the ADD1 and DEC1 keys to adjust the minutes of the game time, and use the ADD2 and DEC2 keys to adjust the seconds of the comparison time;
6. The game time can be paused/started at any time;
7. During the game, you can add or subtract the score of Team A through ADD1 and DEC1, and add or subtract the score of Team B through ADD2 and DEC2. Each time a key is pressed, plus/minus 1 point;
8. When the game is over, you can change the field through the (EXCHANGE) switch button. After the field change, the score will be exchanged and displayed. After the exchange, when the next game starts, the corresponding score plus and minus keys will also be exchanged;
9. When the game is over, the buzzer will sound an alarm to indicate that the game is over.

[@samuel6736]

Diagram pleasee

[@REVTECH29]

i will upload the diagram and firmware.