function distributeFund(address _to, uint256 _amount) public {
      require(msg.sender == admin);
      require(_amount <= _STAYKFund);
      _STAYKFund = _STAYKFund.sub(_amount);
      lastPay[_to] = block.number;
      _STAYKTokenBalances[_to] = _STAYKTokenBalances[_to].add(_amount);
      emit Transfer(address(this), _to, _amount);
  }