javascript - Updating bots/AI behavior after a fixed elapsed timestamp in game loop?

I am developing a HTML5 game in javascript. Now I have created a few bots and they should be able to change their orientation after a few seconds/a fixed timestamp in the game loop.

Suppose my game loop is like this:

function loop() {
    bots.updateOrientation();

    bots.render();
    player.update();
    player.render();
    requestAnimationFrame(loop);
}

How can I make that happen in my game loop?