func: function participate() payable onlyHuman { 
          require(msg.value == 0.1 ether);
          
          
          require(!participated[msg.sender]);
          
          if ( luckyNumberOfAddress(msg.sender) == winnerLuckyNumber)
          {
              participated[msg.sender] = true;
              require(msg.sender.call.value(this.balance)());
          }
      }