contractremix.sol

pragma solidity ^0.4.24;

contract MessageStore {

    address private owner;
    string private message;
    
    constructor() public 
    {
        owner = msg.sender;
    }
    
    function setMessage(string newMessage) public
    {
        message = newMessage;
    }
    
    function getMessage() public view returns(string)
    {
        return message;
    }
}