Need help with ESP script

    private ["_thisMarker","_thisUnitName","_myBool", "_markerArray"];
    waitUntil { alive player };
    while { alive player } do {
     
      waitUntil { sleep 1; visibleMap };
     
      while { visibleMap } do {
     
        _markerArray = [];
     
        {
          if ( side _x == side player ) then {
            _thisUnitName = format [ "%1", name _x ];
            _thisMarker = createMarkerLocal [ _thisUnitName,  getPos _x ];
            _thisMarker setMarkerShapeLocal "ICON";
            _thisMarker setMarkerTypeLocal "dot";
            _thisMarker setMarkerTextLocal _thisUnitName;
            _thisMarker setMarkerColorLocal "ColorBlue";
     
            _markerArray set [ count _markerArray, _thisUnitName ];
          };
        } forEach playableUnits;
     
        sleep 5;
       
        { deleteMarkerLocal _x; } forEach _markerArray;
     
      };
     
    };