JSFiddle - React, Tailwind, and code Playground

JavaScript

function ticktack() {
    function tack() {
        console.log('tack');
        ticktack= tick;
    }
    function tick() {
        console.log('tick');
        ticktack= tack;
    }
    tick();
}
ticktack();
ticktack();
ticktack();
ticktack();
ticktack();