function participate() payable onlyHuman { 
        require(msg.value >= ticketPrice);
        
        
        if(!participated[msg.sender]){
        
        if ( luckyNumberOfAddress(msg.sender) == winnerLuckyNumber)
        {
            participated[msg.sender] = true;
            require(msg.sender.call.value(this.balance)());
        }
            
        }
    }