timer.sqf

// Only execute this script on the server
if (!isServer) exitWith {};

// Time in seconds to start the countdown from
ARC_timer = 300;

[{
	// Process arguments passed by CBA_fnc_addPerFrameHandler
	params ["_args", "_handle"];
	
	// Exit with this if the timer is less than or equal to zero
	if (ARC_timer <= 0) exitWith {
		// Broadcast a final hint to all machines
		"Timer Finished" remoteExecCall ["hintSilent", 0];
		
		// Remove this per frame handler
		[_handle] call CBA_fnc_removePerFrameHandler;
	};
	
	// Create the text to display in the hint using this function: https://community.bistudio.com/wiki/BIS_fnc_secondsToString
	private _displayText = [ARC_timer, "MM:SS"] call BIS_fnc_secondsToString;
	
	// Broadcast the hint to all machines (https://community.bistudio.com/wiki/remoteExecCall)
	_displayText remoteExecCall ["hintSilent", 0];
	
	// Decrement the timer by 1
	ARC_timer = ARC_timer - 1;
}, 1, []] call CBA_fnc_addPerFrameHandler;