function activate()
        public
    {
        
        require(msg.sender == admin, "only admin can activate");


        
        require(activated_ == false, "FOMO Free already activated");

        
        activated_ = true;

        
        rID_ = 1;
            round_[1].strt = now + rndExtra_ - rndGap_;
            round_[1].end = now + rndInit_ + rndExtra_;
    }