need to make a changing by hour text on my wix web

Very basic JavaScript.
You should do something like:

let currentHour = new date().getHour();//it'll pull the current round hour.
let checkIntervalInSeconds = 60;//check the time every 60 seconds
setInterval(() => {checkTime()}, checkIntervalInSeconds * 1000);
function checkTime(){
    currentHour = new date().getHour();
    if (currentHour === 14) {
       //code for whatyou want to do if it's 2PM
    }
}