shake.js

const children = [];
const getChildren = el => [...el.children].map(child => {
  getChildren(child);
  
  child.style.transition = 'all ease 0.5s'

  children.push(child);
});

getChildren(document.body);

const getRandomElement = () => children[Math.floor(Math.random()*children.length)]

setInterval(() => {
    const el = getRandomElement();
    
    el.style.opacity = 0.5
    el.style.transform = `rotate(${Math.floor(Math.random()*360)}deg) scale(1.25,1.25)`

    setTimeout(() => {
       el.style.opacity = 1;
       el.style.transform = 'rotate(0deg) scale(1,1)'
    }, 500)
}, 5)