How to use box open script

init-code.sqf

if (isServer) then {
    _initBox = {
        _box = _this select 0;
        _box setVariable ["used",false,true]; 
        _box setVariable ["looted",false,true]; 
        clearItemCargoGlobal _box; 
        clearMagazineCargoGlobal _box; 
        clearWeaponCargoGlobal _box;
    };

    [myBox] call _initBox;

    startBoxes = {
        myBox addAction ["<t color='#FF0000'>Open the box</t>", "mission\scripts\open-crate.sqf",nil,0.5,true,true,"'","!(myBox getVariable 'used')"];
    };
    publicVariable "startBoxes";

    [[],"startBoxes",true,true] spawn BIS_fnc_MP;
};

instructions

HOW TO USE THIS SCRIPT:

1 - Place the code inside "init-code.sqf" anywhere within your init.sqf.
2 - Save "open-crate.sqf" inside your "mission\scripts" folder.
3 - Make a box/crate/whatever object, name it something like "myBox".
4 - If you want to customize what happens when the box is opened, use line @46 in the "open-crate.sqf" script, within the {  }.
5 - Customize the desired time needed on line @5 of the "open-crate.sqf" script.
6 - If it all works, you should have an action to open the box.

open-crate.sqf

_safe = _this select 0;
_caller = _this select 1;

_minutes = 5;

_difficulty = (_minutes*60);
_listEasy = [];

_crackTime = 0;
_remaining = _difficulty;

_extramsg = "This is a simple lock so it won't take long.";

if (!(_caller in _list)) then {
    _difficulty = _difficulty * 3;
    _extramsg = "You have no idea what you're doing so this will take a while.";
};

_safe setVariable ["used",true,true];
cancelCrack = false;

waituntil {!(IsNull (findDisplay 46))};
_EHid = (findDisplay 46) displayAddEventHandler ["KeyDown","
if ((_this select 1 == 1) || (_this select 1 == 30) || (_this select 1 == 31) || (_this select 1 == 32) ||(_this select 1 == 17) ) then {cancelCrack = true;} else {cancelCrack = false;}"]; 

[-1,{_this switchMove "Acts_TreatingWounded05"},_caller] call CBA_fnc_globalExecute;
_playerHealth = getDammage _caller;

while {(_crackTime < _difficulty)} do {
    
    hintSilent format ["********************\n\n You start opening the crate.\n\n%1 minute(s) remaining.\n\n %2 \n\n********************",_remaining/60, _extramsg];
        
    if (cancelCrack) exitWith { cancelCrack = false };
    if ((_playerHealth != getDammage _caller)) exitWith {};
    
    _crackTime = _crackTime + 1;
    
    if ((_crackTime mod 60) == 0) then {
        _remaining = _remaining - 60;
    };
    sleep 1;
};

if (_crackTime == _difficulty) exitWith {
    hint "You've successfully opened the box.";

switch(_safe) do {
    case myBox: {  };
};    
    
    _safe setVariable ["looted",true,true];
    
    [-1,{(_this select 0) switchMove "aidlpknlmstpslowwrfldnon_idlesteady02"},[_caller]] call CBA_fnc_globalExecute;
};

hint "Opening stopped, try again!";
_safe setVariable ["used",false,true];

[-1,{ (_this select 0) switchMove "aidlpknlmstpslowwrfldnon_idlesteady02" },[_caller]] call CBA_fnc_globalExecute;