contract AccessControl {
    address public creatorAddress;
    uint16 public totalSeraphims = 0;
    mapping (address => bool) public seraphims;

    bool public isMaintenanceMode = true;
 
    modifier onlyCREATOR() {
        require(msg.sender == creatorAddress);
        _;
    }

    modifier onlySERAPHIM() {
        require(seraphims[msg.sender] == true);
        _;
    }
    
    modifier isContractActive {
        require(!isMaintenanceMode);
        _;
    }
    
    // Constructor
    function AccessControl() public {
        creatorAddress = msg.sender;
    }
    

    function addSERAPHIM(address _newSeraphim) onlyCREATOR public {
        if (seraphims[_newSeraphim] == false) {
            seraphims[_newSeraphim] = true;
            totalSeraphims += 1;
        }
    }
    
    function removeSERAPHIM(address _oldSeraphim) onlyCREATOR public {
        if (seraphims[_oldSeraphim] == true) {
            seraphims[_oldSeraphim] = false;
            totalSeraphims -= 1;
        }
    }

    function updateMaintenanceMode(bool _isMaintaining) onlyCREATOR public {
        isMaintenanceMode = _isMaintaining;
    }

  
}
function AccessControl() public {
        creatorAddress = msg.sender;
    }
// Constructor