a correction to the previous deployment at : https://gist.github.com/Ultra-Tech-code/aafb6c59311d5481097c318b12f0d456

counter.sol

//SPDX-License-Identifier: MIT

pragma solidity ^0.8.13;

contract examole{
    uint count;

    uint timeframe = block.timestamp + 30 seconds;
    // uint timeframe;

    modifier timer{
        require(block.timestamp <= timeframe, "time has elapsed");
        _;
    }

    function add() public  timer{
        count++;
    }

    function decrement() public timer{
        count--;
    }
    function getCount() public view returns(uint){
        return count;
    }
}