Can you help me with a js script?

Question

function printTime() {
var d = new Date();
var hours = d.getHours();
var mins = d.getMinutes();
var secs = d.getSeconds();
document.body.innerHTML = hours+":"+mins+":"+secs;
}
setInterval(printTime, 1);

When the seconds are <10 the browser writes 1,2 ,3 ,6, 9, however I want it to write 01, 05, 09 and so on. It's the same problem with the minutes.
I tried it with the if statement. Can someone explain the code of rhis to me pls.

Answer 1

if (secs<9) secs="0" + secs

The same goes for minutes.

Also, the interval will work just fine if you set it at 1000.

Answer 2

I wrote it w document.body.innerHTML and it didnt work