- const COUNT = 10
- let b = 0
while b < COUNT
  .box= b + 1
  - b++

*
  box-sizing border-box
  
body
  display grid
  place-items center
  min-height 100vh
  background hsl(0, 0%, 10%)
  
.box
  position absolute
  top 50%
  left 50%
  height 25vmin
  width 25vmin
  display grid
  place-items center
  font-size 5vmin
  font-family sans-serif
  transform translate(-50%, -50%)
  
  &:nth-of-type(odd)
    background hsl(90, 80%, 70%)
  
  &:nth-of-type(even)
    background hsl(90, 80%, 40%)

import gsap from 'https://cdn.skypack.dev/gsap'

const STAGGER = 0.5
const BOXES = gsap.utils.toArray('.box')

const LOOP = gsap.timeline({
  paused: true,
  repeat: -1,
})

const SHIFTS = [...BOXES, ...BOXES, ...BOXES]

SHIFTS.forEach((BOX, index) => {
  LOOP.fromTo(BOX, {
    xPercent: 100
  }, {
    xPercent: -200,
    duration: 1,
    ease: 'none',
  }, index * STAGGER)
})


gsap.fromTo(LOOP, {
  totalTime: 5.5,
},
{
  totalTime: '+=5',
  duration: 10,
  ease: 'none',
  repeat: -1,
})