function updateClock() {
    let now = new Date();
    let milli = now.getMilliseconds();
    let sec = now.getSeconds();
    let min = now.getMinutes();
    let hr = now.getHours();
    let mm = now.getMonth();
    let dy = now.getDate();
    let yyyy = now.getFullYear();
//     console.log(`${dy}:${mm}:${yyyy}:${hr}:${mm}:${sec}:${milli}:`)
    document.body.style.background = "white";
    document.body.innerHTML = `<h1>${dy}:${mm}:${yyyy}:${hr}:${mm}:${sec}:${milli}</h1>`
}

function initialClock() {
    updateClock();
    window.setInterval(updateClock, 1)

}
initialClock();