How to add a timer on page load that stops when button is clicked?

I want to add a timer to the page where it starts on page load.

Where it goes up in milliseconds.

Then stops when the mouse is clicked on the button.

How would I create a code example of that?

https://jsfiddle.net/724n1qro/

That is all I am trying to do in the code.

Add a timer that starts on page load.

Goes up in milliseconds.

Then stops when the button is clicked.

.play {
  -webkit-appearance: none;
  appearance: none;
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  margin: auto;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 90px;
  height: 90px;
  border-radius: 50%;
  cursor: pointer;
  border: 9px solid blue;
  background: transparent;
  filter: drop-shadow(3px 3px 3px #000000b3);
}

 <button class="play" type="button" aria-label="Open"></button>