Try 1

private ["_silver","_silver10oz","_gold","_gold10oz","_briefcase","_random","_random2"];

_AI = "scripts\rob\AI.sqf";
// Checks if script is active, thanks Halvhjearne <3
if(isNil "script_in_progress")then{
    script_in_progress = false;
};

if(script_in_progress)exitwith{
    systemChat "This script is only useable once (untill restart)!";
};
script_in_progress = true;
// End Checks if Script is active


cutText [format["You are about to rob the bank, your have 30 percent chance to get loot."], "PLAIN DOWN"];
sleep 5;

// Currency //
_silver = "ItemSilverBar";
_silver10oz = "ItemSilverBar10oz";
_gold = "ItemGoldBar";
_gold10oz = "ItemGoldBar10oz";
_briefcase = "ItemBriefcase100oz";

// Makes sure that the game checks for the 30 percent.
_random = floor(random 11); //0-10
if (_random <= 3) then {
    cutText [format["You are robbing the bank, the Guards has been warned. \n It takes 5 minutes before the bank robbery is succesfull."], "PLAIN DOWN"];
    sleep 5;
    [nil,nil,rTitleText,"The bank is getting robbed!", "PLAIN",10] call RE;
    sleep 55;
    cutText [format["4 minutes left..."], "PLAIN DOWN"];
    sleep 20;
    cutText [format["The Guards have discovered you! Protect yourself!", "PLAIN DOWN"];
    execVM _AI;
    sleep 40;
    cutText [format["3 minutes left..."], "PLAIN DOWN"];
    sleep 20;
    cutText [format["I'm nervous, need a Cigarette!"], "PLAIN DOWN"];
    sleep 40;
    cutText [format["2 minutes left..."], "PLAIN DOWN"];
    sleep 20;
    cutText [format["Oh Crap i shit into my Pants!"], "PLAIN DOWN"];
    sleep 40;
    cutText [format["1 minute left..."], "PLAIN DOWN"];
    sleep 20;
    cutText [format["Grab your Balls and be get out here!"], "PLAIN DOWN"];
    sleep 40;
    player playActionNow "Medic";
    sleep 8;
    [nil,nil,rTitleText,"The bank has been robbed succesfully!", "PLAIN",10] call RE;
    _random2 = floor(random 6);
    // Makes an another random section, which chooses the loot randomly.
        if (_random2 == 0) then {
            cutText [format["The vault was emptied recently, no big loot, except some silver."], "PLAIN DOWN"];
            player addMagazine _silver10oz;
            player addMagazine _silver10oz;
            player addMagazine _silver;
            systemChat "The robber got: 2x Silver10oz and 1x Silver";
        };
        if (_random2 == 1) then {
            cutText [format["Some gold, not much."], "PLAIN DOWN"];
            player addMagazine _gold;
            player addMagazine _gold;
            systemChat "The robber got: 2x gold";
        };
        if (_random2 == 2) then {
            cutText [format["Nice job!"], "PLAIN DOWN"];
            player addMagazine _gold10oz;
            player addMagazine _gold10oz;
            player addMagazine _gold10oz;
            player addMagazine _gold10oz;
            player addMagazine _gold10oz;
            systemChat "The robber got: 5x gold10oz";
        };
        if (_random2 == 3) then {
            cutText [format["Some gold, not much."], "PLAIN DOWN"];
            player addMagazine _gold;
            player addMagazine _gold;
            player addMagazine _gold10oz;
            systemChat "The robber got: 2x gold and 1x Gold10oz";
        };
        if (_random2 == 4) then {
            cutText [format["The vault was emptied recently, no big loot, except some silver."], "PLAIN DOWN"];
            player addMagazine _silver10oz;
            player addMagazine _silver10oz;
            player addMagazine _silver;
            systemChat "The robber got: 2x Silver10oz and 1x Silver";
        };
        if (_random2 == 5) then {
            cutText [format["Jack.. Jack.. Pot!!"], "PLAIN DOWN"];
            player addMagazine _briefcase;
            player addMagazine _briefcase;
            systemChat "Ting ting ting... The jackpot has been stolen! Bye bye 2 briefcases";
        };
        // Output if above is not activated.
            } else {
                cutText [format["Bank robbery failed.."], "PLAIN DOWN"];
                systemChat "Bank robbery failed!";
            };
sleep 3600;
script_in_progress = false;
/* Remove the // to enable the script to able to be used again.
By "sleep seconds:" i.e: sleep 60; (able to use script after 60 seconds again).
*/