Emitting events in Solidity to be Indexed

Emit_solidity.sol

pragma solidity ^0.4.0;

contract AccountReceipt {
    event AccountCreated(
        address indexed _from,
        bytes32 indexed _id,
        uint _value
    );

    function AccountReceipt(bytes32 _id) public payable {
        emit AccountCreated(msg.sender, _id, msg.value);
    }
}