useModifier.sol

pragma solidity ^0.4.0;

contract useModifier{
    address owner;
    
    function Constructor() private{
        owner = msg.sender;
    }
    
    function kill() private onlyowner{
        selfdestruct(owner);
    }
    
    modifier onlyowner(){
        if(owner == msg.sender){
            _;
        }
        else{
            revert();
        }
    }
    
}