Take a look at the video to see it at work. Check the next steps for the Schematic and code.
Just connect it as the schematic shows. Upload the code and it should work. I added a on/off switch a reset button and a power jack, those are not shown on the schematic but easy to add.
To add a reset button just add a button to the reset pin, put one wire in the reset pin and one in ground. You can also add extra buttons for C and D as shown on the schematic.
My final project will have a red button for the red team and green for green team.
There are multiple codes inside. Open and upload the Time_Bomb_Airsoft_Game.ino If you connected everything the right way it should work right away. Be creative! Make a nice enclosure for it.