Example Code: Reveal Units Temporarily

Arma 3 v1.92

/*
    Author: Revo

    Description:
    Reveals units in a defined area temporarily.

    Parameter(s):
    See defines below
    Returns:
    BOOLEAN - true
*/

// replace here
#define CENTER player    // the area around this object will be scanned
#define RADIUS 100        // radius of the area
#define DELETE_TIME 5    // how long will the units be revealed in seconds
#define TOLERANCE 5        // accuracy of the units positions in meters
#define DELAY 1            // delay in between reveal of units in seconds (60 units take 60 seconds to show)
// replace end

[CENTER, RADIUS, DELETE_TIME, TOLERANCE, DELAY] spawn
{
    params ["_center", "_radius", "_deleteTime", "_tolerance", "_delay"];
    private _nearestUnits = nearestObjects [_center, ["CAManBase"], _radius];

    systemChat "Scanning in progress...";

    createMarker ["areaBorderTemp", _center];
    "areaBorderTemp" setMarkerShape "ELLIPSE";
    "areaBorderTemp" setMarkerSize [_radius, _radius];
    "areaBorderTemp" setMarkerBrush "Border";

    {
        private _marker = createMarker [format ["tempMarker_%1", _forEachIndex], _x getPos [_tolerance, random 360]];
        _marker setMarkerType "o_unknown";
        _marker setMarkerColor "ColorUNKNOWN";
        _marker setMarkerSize [0.5, 0.5];
        sleep _delay;
    } forEach _nearestUnits;

    systemChat format ["%1 entities found.", count _nearestUnits];
    systemChat format ["Position tolerance: %1 m", _tolerance];

    sleep _deleteTime;

    for "_i" from 0 to (count _nearestUnits) - 1 do
    {
        deleteMarker format ["tempMarker_%1", _i];
        sleep _delay;
    };

    deleteMarker "areaBorderTemp";
};

true;