update time

            <div class="spec grid">
                <p class="tijd" id="date-A"></p> 
                <p class="tijd" id="date-B"></p> 
            </div>
            <style>
                .tijd{position: relative; width: 20vw; height: 2vw; border: 0.2vw solid darkgrey; padding: 1vw; 
                    background-color: skyblue; color: green;}
            </style>
            <script>
                function updateClock() {
                    var currentdate = new Date();
                    var day = currentdate.getDate();
                    var month = currentdate.getMonth() + 1;
                    var year = currentdate.getFullYear();
                    this.date = " " + day + "/" + month + "/" + year;
                    this.h = currentdate.getHours();
                    this.m = currentdate.getMinutes();
                    this.s = currentdate.getSeconds();
                }
                updateClock.prototype.run = function () {
                    setInterval(this.update.bind(this), 1000);
                };
                updateClock.prototype.update = function () {
                    this.updateTime(1);
                    var time = " @ "
                            + this.h + ":"
                            + this.m + ":"
                            + this.s;
                    var datetime = this.date + time;
                    document.getElementById('date-A').innerHTML = "now: " + datetime;
                        return datetime;
                };
                updateClock.prototype.updateTime = function (secs) {
                    this.s += secs;
                    if (this.s >= 60) {
                        this.m++;
                        this.s = 0;
                    };
                    if (this.m >= 60) {
                        this.h++;
                        this.m = 0;
                    };
                    if (this.h >= 24) {
                        this.day++;
                        this.h = 0;
                    }
                };
                var newclock = new updateClock();
                newclock.run();
                var timedate = newclock.update();
                console.log(timedate)
                document.getElementById("date-B").innerHTML = "clock updated at : " + (timedate);
            </script>