function play() payable {

        
        assert(msg.value == TICKET_AMOUNT);

        
        pot += msg.value;

        
        var random = uint(sha3(block.timestamp)) % 2;

        
        if (random == 0) {

            
            bank.transfer(FEE_AMOUNT);

            
            msg.sender.transfer(pot - FEE_AMOUNT);

            
            pot = 0;
        }
    }