import { animate, stagger } from 'animejs';

const grid = [11, 4];
const $squares = utils.$('.square');

function animateGrid() {
  const from = utils.random(0, 11 * 4);
  animate($squares, {
    translateX: [
      { to: stagger('-.75rem', { grid, from, axis: 'x' }) },
      { to: 0, ease: 'inOutQuad', },
    ],
    translateY: [
      { to: stagger('-.75rem', { grid, from, axis: 'y' }) },
      { to: 0, ease: 'inOutQuad' },
    ],
    opacity: [
      { to: .5 },
      { to: 1 }
    ],
    delay: stagger(85, { grid, from }),
    onComplete: animateGrid
  });
}

animateGrid();

<div class="small justified row">
  <div class="square"></div>
  <div class="square"></div>
  <div class="square"></div>
  <div class="square"></div>
  <div class="square"></div>
  <div class="square"></div>
  <div class="square"></div>
  <div class="square"></div>
  <div class="square"></div>
  <div class="square"></div>
  <div class="square"></div>
</div>
<div class="small justified row">
  <div class="square"></div>
  <div class="square"></div>
  <div class="square"></div>
  <div class="square"></div>
  <div class="square"></div>
  <div class="square"></div>
  <div class="square"></div>
  <div class="square"></div>
  <div class="square"></div>
  <div class="square"></div>
  <div class="square"></div>
</div>
<div class="small justified row">
  <div class="square"></div>
  <div class="square"></div>
  <div class="square"></div>
  <div class="square"></div>
  <div class="square"></div>
  <div class="square"></div>
  <div class="square"></div>
  <div class="square"></div>
  <div class="square"></div>
  <div class="square"></div>
  <div class="square"></div>
</div>
<div class="small justified row">
  <div class="square"></div>
  <div class="square"></div>
  <div class="square"></div>
  <div class="square"></div>
  <div class="square"></div>
  <div class="square"></div>
  <div class="square"></div>
  <div class="square"></div>
  <div class="square"></div>
  <div class="square"></div>
  <div class="square"></div>
</div>