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HTML 

              
                <div class="background">
   <span></span>
   <span></span>
   <span></span>
   <span></span>
   <span></span>
   <span></span>
   <span></span>
   <span></span>
   <span></span>
   <span></span>
   <span></span>
   <span></span>
   <span></span>
   <span></span>
   <span></span>
   <span></span>
   <span></span>
   <span></span>
   <span></span>
   <span></span>
   <span></span>
   <span></span>
   <span></span>
   <span></span>
   <span></span>
   <span></span>
   <span></span>
   <span></span>
   <span></span>
   <span></span>
   <span></span>
   <span></span>
   <span></span>
   <span></span>
   <span></span>
   <span></span>
   <span></span>
   <span></span>
   <span></span>
   <span></span>
   <span></span>
   <span></span>
   <span></span>
</div>

<div data-scroll-container class="smoothScroll">

  <div class="content-container">
 
    <div class="bufferzone"></div>

    <div class="part part-1">

      <div class="bg bg-1"></div>
      <div class="imger"></div>
    </div>

    <div class="part part-2">
      <div class="bg bg-2"></div>
      <div class="imger"></div>
    </div>

    <div class="part part-4">
      <div class="bg bg-4"></div>
      <div class="imger"></div>
    </div>

    <div class="part part-5">
      <div class="bg bg-5"></div>
      <div class="imger"></div>
    </div>

    <div class="part part-6">
      <div class="bg bg-6"></div>
      <div class="imger"></div>
    </div>

    <div class="part part-7">
      <div class="bg bg-7"></div>
      <div class="imger"></div>
    </div>

    <div class="bufferzone"></div>

  </div>
  
</div>

<div class="center-indicator"></div>
!

CSS 

              
                html { 
  overflow: hidden; height: -webkit-fill-available; scroll-behavior: smooth; }


body { 
  background-color: #fff; margin: 0; padding: 0; transition: opacity ease-out 400ms; font-family: sans-serif; }

html, body{ 
  min-height: 100vh; }

.bufferzone {
  height:100vh;
    width:100vw;
}

.smoothScroll {
   
}

.content-container{
 mix-blend-mode: difference;  
  display: flex;
  flex-direction: row;
  position: relative;
  width: auto;
  height: auto;
}

.part{
  display: flex;
  width: auto;
  height: 100vh;
  justify-content: center;
  align-items: center;
}

.bg{
  position: absolute;

  //width: 150vw; 
  width: 250vw; 
  height: 100vh;
  
  //transform: translate(150vw);
}

.bg-1 {
background: rgb(255,255,255);
background: linear-gradient(90deg, rgba(0,0,0,0) 0%, blue 15%, blue 85%, rgba(0,0,0,0) 100%);
    justify-content: center;
    align-items: center;
  }
  .bg-2{
background: rgb(255,255,255);
background: linear-gradient(90deg, rgba(0,0,0,0) 0%, rgba(236,244,12,1) 15%, rgba(236,244,12,1) 85%, rgba(0,0,0,0) 100%);
    color: #83448F;
    justify-content: center;
    align-items: center;
  }

  .bg-4{
   background: linear-gradient(90deg, rgba(0,0,0,0) 0%, blue 15%, blue 85%, rgba(0,0,0,0) 100%);
    color: #F3ECCF;
    justify-content: center;
    align-items: center;
  }

  .bg-5{
background: linear-gradient(90deg, rgba(0,0,0,0) 0%, yellow 15%, yellow 85%, rgba(0,0,0,0) 100%);
    color: #F3ECCF;
    justify-content: center;
    align-items: center;
  }

  .bg-6{
background: linear-gradient(90deg, rgba(0,0,0,0) 0%, orange 15%, orange 85%, rgba(0,0,0,0) 100%);
    color: #F3ECCF;
    justify-content: center;
    align-items: center;
  }
  .bg-7{
background: linear-gradient(90deg, rgba(0,0,0,0) 0%, purple 15%, purple 85%, rgba(0,0,0,0) 100%);
    color: #F3ECCF;
    justify-content: center;
    align-items: center;
  }
.imger {
  height: 80vh;
  width: 80vh;
  background-color: red;
  z-index: 999999;
  position: relative;
  margin-right: 10px;
}






// LOCOMOTIVE CSS (WILL NOT WORK WITHOUT THIS)
/*! locomotive-scroll v4.1.0 | MIT License | https://github.com/locomotivemtl/locomotive-scroll */
html.has-scroll-smooth {
  overflow: hidden; }

html.has-scroll-dragging {
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none; }

.has-scroll-smooth body {
  overflow: hidden; }

.has-scroll-smooth [data-scroll-container] {
  min-height: 100vh; }

[data-scroll-direction="horizontal"] [data-scroll-container] {
  white-space: nowrap;
  height: 100vh;
  display: inline-block;
  white-space: nowrap; }

[data-scroll-direction="horizontal"] [data-scroll-section] {
  display: inline-block;
  vertical-align: top;
  white-space: nowrap;
  height: 100%; }

.c-scrollbar {
  position: absolute;
  right: 0;
  top: 0;
  width: 11px;
  height: 100%;
  transform-origin: center right;
  transition: transform 0.3s, opacity 0.3s;
  opacity: 0; }
  .c-scrollbar:hover {
    transform: scaleX(1.45); }
  .c-scrollbar:hover, .has-scroll-scrolling .c-scrollbar, .has-scroll-dragging .c-scrollbar {
    opacity: 1; }
  [data-scroll-direction="horizontal"] .c-scrollbar {
    width: 100%;
    height: 10px;
    top: auto;
    bottom: 0;
    transform: scaleY(1); }
    [data-scroll-direction="horizontal"] .c-scrollbar:hover {
      transform: scaleY(1.3); }

.c-scrollbar_thumb {
  position: absolute;
  top: 0;
  right: 0;
  background-color: black;
  opacity: 0.5;
  width: 7px;
  border-radius: 10px;
  margin: 2px;
  cursor: -webkit-grab;
  cursor: grab; }
  .has-scroll-dragging .c-scrollbar_thumb {
    cursor: -webkit-grabbing;
    cursor: grabbing; }
  [data-scroll-direction="horizontal"] .c-scrollbar_thumb {
    right: auto;
    bottom: 0; }


.center-indicator {
  position: absolute;
  width: 2px;
  height: 100%;
  background: green;
  left: calc(50vw - 1px);
  top: 0;
  z-index: 999;
}


@keyframes move {
    100% {
        transform: translate3d(0, 0, 1px) rotate(360deg);
    }
}

.background {
    position: absolute;
    width: 100%;
    height: 100vh;
    top: 0;
    left: 0;
    background: #ffffff;
    overflow: hidden;
}

.background span {
    width: 12vmin;
    height: 12vmin;
    border-radius: 12vmin;
    backface-visibility: hidden;
    position: absolute;
    animation: move;
    animation-duration: 48;
    animation-timing-function: linear;
    animation-iteration-count: infinite;
}


.background span:nth-child(0) {
    color: #e23b03;
    top: 91%;
    left: 30%;
    animation-duration: 8s;
    animation-delay: -7s;
    transform-origin: 4vw 6vh;
    box-shadow: 24vmin 0 3.9381380061624265vmin currentColor;
}
.background span:nth-child(1) {
    color: #ef0148;
    top: 64%;
    left: 67%;
    animation-duration: 6s;
    animation-delay: -7s;
    transform-origin: -18vw -12vh;
    box-shadow: -24vmin 0 3.578512614173838vmin currentColor;
}
.background span:nth-child(2) {
    color: #ef0148;
    top: 68%;
    left: 28%;
    animation-duration: 19s;
    animation-delay: -12s;
    transform-origin: 15vw 17vh;
    box-shadow: 24vmin 0 3.9011805035316343vmin currentColor;
}
.background span:nth-child(3) {
    color: #db0a2a;
    top: 38%;
    left: 34%;
    animation-duration: 23s;
    animation-delay: -9s;
    transform-origin: -10vw -20vh;
    box-shadow: 24vmin 0 3.9746003934238843vmin currentColor;
}
.background span:nth-child(4) {
    color: #db0a2a;
    top: 49%;
    left: 38%;
    animation-duration: 25s;
    animation-delay: -2s;
    transform-origin: 16vw 21vh;
    box-shadow: 24vmin 0 3.1633782402147355vmin currentColor;
}
.background span:nth-child(5) {
    color: #ef0148;
    top: 40%;
    left: 6%;
    animation-duration: 12s;
    animation-delay: -2s;
    transform-origin: -11vw 14vh;
    box-shadow: -24vmin 0 3.528883340548677vmin currentColor;
}
.background span:nth-child(6) {
    color: #ef0148;
    top: 96%;
    left: 21%;
    animation-duration: 22s;
    animation-delay: -9s;
    transform-origin: 25vw 6vh;
    box-shadow: -24vmin 0 3.5003279316412277vmin currentColor;
}
.background span:nth-child(7) {
    color: #e23b03;
    top: 70%;
    left: 12%;
    animation-duration: 19s;
    animation-delay: -10s;
    transform-origin: -23vw -1vh;
    box-shadow: -24vmin 0 3.4010394937297947vmin currentColor;
}
.background span:nth-child(8) {
    color: #e23b03;
    top: 6%;
    left: 5%;
    animation-duration: 9s;
    animation-delay: -14s;
    transform-origin: 21vw 16vh;
    box-shadow: 24vmin 0 3.783591985477768vmin currentColor;
}
.background span:nth-child(9) {
    color: #db0a2a;
    top: 67%;
    left: 39%;
    animation-duration: 19s;
    animation-delay: -10s;
    transform-origin: 15vw -8vh;
    box-shadow: -24vmin 0 3.9571407352420733vmin currentColor;
}
.background span:nth-child(10) {
    color: #ef0148;
    top: 82%;
    left: 46%;
    animation-duration: 10s;
    animation-delay: -2s;
    transform-origin: 4vw 17vh;
    box-shadow: 24vmin 0 3.759437621108271vmin currentColor;
}
.background span:nth-child(11) {
    color: #e23b03;
    top: 25%;
    left: 78%;
    animation-duration: 10s;
    animation-delay: -5s;
    transform-origin: 9vw 12vh;
    box-shadow: -24vmin 0 3.9572753784603845vmin currentColor;
}
.background span:nth-child(12) {
    color: #db0a2a;
    top: 58%;
    left: 97%;
    animation-duration: 21s;
    animation-delay: -17s;
    transform-origin: -14vw 8vh;
    box-shadow: 24vmin 0 3.6059421302790846vmin currentColor;
}
.background span:nth-child(13) {
    color: #db0a2a;
    top: 74%;
    left: 4%;
    animation-duration: 23s;
    animation-delay: -15s;
    transform-origin: 23vw -17vh;
    box-shadow: 24vmin 0 3.695259738350418vmin currentColor;
}
.background span:nth-child(14) {
    color: #ef0148;
    top: 52%;
    left: 42%;
    animation-duration: 25s;
    animation-delay: -19s;
    transform-origin: 10vw -7vh;
    box-shadow: -24vmin 0 3.73894051739131vmin currentColor;
}
.background span:nth-child(15) {
    color: #e23b03;
    top: 69%;
    left: 66%;
    animation-duration: 17s;
    animation-delay: -9s;
    transform-origin: -12vw -10vh;
    box-shadow: 24vmin 0 3.047299563625905vmin currentColor;
}
.background span:nth-child(16) {
    color: #ef0148;
    top: 59%;
    left: 6%;
    animation-duration: 15s;
    animation-delay: -6s;
    transform-origin: 19vw -6vh;
    box-shadow: -24vmin 0 3.625317111733916vmin currentColor;
}
.background span:nth-child(17) {
    color: #db0a2a;
    top: 28%;
    left: 54%;
    animation-duration: 12s;
    animation-delay: -19s;
    transform-origin: 6vw 15vh;
    box-shadow: -24vmin 0 3.4178922453922933vmin currentColor;
}
.background span:nth-child(18) {
    color: #e23b03;
    top: 69%;
    left: 29%;
    animation-duration: 12s;
    animation-delay: -10s;
    transform-origin: 11vw -11vh;
    box-shadow: 24vmin 0 3.434740974983952vmin currentColor;
}
.background span:nth-child(19) {
    color: #db0a2a;
    top: 15%;
    left: 95%;
    animation-duration: 14s;
    animation-delay: -14s;
    transform-origin: 7vw -17vh;
    box-shadow: 24vmin 0 3.3796819322286904vmin currentColor;
}
.background span:nth-child(20) {
    color: #ef0148;
    top: 49%;
    left: 43%;
    animation-duration: 22s;
    animation-delay: -1s;
    transform-origin: -13vw 0vh;
    box-shadow: 24vmin 0 3.302033905826854vmin currentColor;
}
.background span:nth-child(21) {
    color: #e23b03;
    top: 7%;
    left: 49%;
    animation-duration: 11s;
    animation-delay: -4s;
    transform-origin: -11vw -14vh;
    box-shadow: 24vmin 0 3.5528575174612405vmin currentColor;
}
.background span:nth-child(22) {
    color: #db0a2a;
    top: 84%;
    left: 54%;
    animation-duration: 14s;
    animation-delay: -2s;
    transform-origin: -11vw -20vh;
    box-shadow: 24vmin 0 3.311161890039559vmin currentColor;
}
.background span:nth-child(23) {
    color: #e23b03;
    top: 71%;
    left: 91%;
    animation-duration: 23s;
    animation-delay: -9s;
    transform-origin: 2vw -17vh;
    box-shadow: 24vmin 0 3.186764783801273vmin currentColor;
}
.background span:nth-child(24) {
    color: #db0a2a;
    top: 52%;
    left: 19%;
    animation-duration: 14s;
    animation-delay: -19s;
    transform-origin: 25vw -12vh;
    box-shadow: -24vmin 0 3.7020928919989013vmin currentColor;
}
.background span:nth-child(25) {
    color: #db0a2a;
    top: 13%;
    left: 62%;
    animation-duration: 6s;
    animation-delay: -19s;
    transform-origin: 8vw 10vh;
    box-shadow: -24vmin 0 3.6923845598463068vmin currentColor;
}
.background span:nth-child(26) {
    color: #db0a2a;
    top: 80%;
    left: 65%;
    animation-duration: 7s;
    animation-delay: -8s;
    transform-origin: 12vw -18vh;
    box-shadow: 24vmin 0 3.3340613607405336vmin currentColor;
}
.background span:nth-child(27) {
    color: #ef0148;
    top: 99%;
    left: 78%;
    animation-duration: 14s;
    animation-delay: -3s;
    transform-origin: -9vw 10vh;
    box-shadow: 24vmin 0 3.313430986996916vmin currentColor;
}
.background span:nth-child(28) {
    color: #db0a2a;
    top: 43%;
    left: 23%;
    animation-duration: 7s;
    animation-delay: -14s;
    transform-origin: 16vw 14vh;
    box-shadow: -24vmin 0 3.9744347269008666vmin currentColor;
}
.background span:nth-child(29) {
    color: #ef0148;
    top: 98%;
    left: 21%;
    animation-duration: 20s;
    animation-delay: -7s;
    transform-origin: -16vw -16vh;
    box-shadow: -24vmin 0 3.143407242934314vmin currentColor;
}
.background span:nth-child(30) {
    color: #e23b03;
    top: 73%;
    left: 55%;
    animation-duration: 10s;
    animation-delay: -11s;
    transform-origin: 15vw 16vh;
    box-shadow: -24vmin 0 3.4255488338415714vmin currentColor;
}
.background span:nth-child(31) {
    color: #db0a2a;
    top: 18%;
    left: 32%;
    animation-duration: 7s;
    animation-delay: -18s;
    transform-origin: -7vw -9vh;
    box-shadow: -24vmin 0 3.417448222335527vmin currentColor;
}
.background span:nth-child(32) {
    color: #db0a2a;
    top: 22%;
    left: 42%;
    animation-duration: 12s;
    animation-delay: -3s;
    transform-origin: 19vw 15vh;
    box-shadow: 24vmin 0 3.9679516395467944vmin currentColor;
}
.background span:nth-child(33) {
    color: #db0a2a;
    top: 10%;
    left: 26%;
    animation-duration: 22s;
    animation-delay: -17s;
    transform-origin: -9vw -8vh;
    box-shadow: -24vmin 0 3.1329314858140433vmin currentColor;
}
.background span:nth-child(34) {
    color: #db0a2a;
    top: 79%;
    left: 46%;
    animation-duration: 17s;
    animation-delay: -5s;
    transform-origin: 7vw 14vh;
    box-shadow: 24vmin 0 3.6373979767406626vmin currentColor;
}
.background span:nth-child(35) {
    color: #db0a2a;
    top: 63%;
    left: 60%;
    animation-duration: 25s;
    animation-delay: -16s;
    transform-origin: 6vw -23vh;
    box-shadow: 24vmin 0 3.841631324656799vmin currentColor;
}
.background span:nth-child(36) {
    color: #ef0148;
    top: 75%;
    left: 26%;
    animation-duration: 14s;
    animation-delay: -16s;
    transform-origin: 20vw 15vh;
    box-shadow: -24vmin 0 3.9738706133226525vmin currentColor;
}
.background span:nth-child(37) {
    color: #e23b03;
    top: 73%;
    left: 2%;
    animation-duration: 15s;
    animation-delay: -2s;
    transform-origin: -20vw 16vh;
    box-shadow: 24vmin 0 3.7202456251633342vmin currentColor;
}
.background span:nth-child(38) {
    color: #db0a2a;
    top: 79%;
    left: 1%;
    animation-duration: 18s;
    animation-delay: -6s;
    transform-origin: -2vw 16vh;
    box-shadow: -24vmin 0 3.8456920968672588vmin currentColor;
}
.background span:nth-child(39) {
    color: #e23b03;
    top: 61%;
    left: 8%;
    animation-duration: 11s;
    animation-delay: -16s;
    transform-origin: 20vw -23vh;
    box-shadow: 24vmin 0 3.6526422807921186vmin currentColor;
}
.background span:nth-child(40) {
    color: #ef0148;
    top: 53%;
    left: 66%;
    animation-duration: 24s;
    animation-delay: -11s;
    transform-origin: 22vw -6vh;
    box-shadow: 24vmin 0 3.395196415624116vmin currentColor;
}
.background span:nth-child(41) {
    color: #ef0148;
    top: 19%;
    left: 61%;
    animation-duration: 18s;
    animation-delay: -7s;
    transform-origin: -4vw -3vh;
    box-shadow: -24vmin 0 3.596120193081557vmin currentColor;
}
.background span:nth-child(42) {
    color: #db0a2a;
    top: 31%;
    left: 58%;
    animation-duration: 12s;
    animation-delay: -19s;
    transform-origin: -12vw 14vh;
    box-shadow: 24vmin 0 3.607460867981278vmin currentColor;
}
!

JS 

              
                

window.addEventListener( 'load', (event) => {

  let locoScrollDefaults = {
    el: document.querySelector('.smoothScroll'),
    smooth: true,
    direction: "horizontal",
  };
  let locoScroll = new LocomotiveScroll(locoScrollDefaults);


  // GSAP integration
  gsap.registerPlugin(ScrollTrigger);

  locoScroll.on("scroll", ScrollTrigger.update);

  ScrollTrigger.scrollerProxy(".smoothScroll", {
    scrollTop(value) {
      return arguments.length ? locoScroll.scrollTo(value, 0, 0) : locoScroll.scroll.instance.scroll.y;
    },
    scrollLeft(value) {
      return arguments.length ? locoScroll.scrollTo(value, 0, 0) : locoScroll.scroll.instance.scroll.x;
    },
    getBoundingClientRect() {
      return {top: 0, left: 0, width: window.innerWidth, height: window.innerHeight};
    },
  });

  const projectTriggers = document.querySelectorAll(".part");

  projectTriggers.forEach(addTimeline);

  function addTimeline(project, index) {
    const bg = project.querySelector(".bg");

    const timeline = gsap.timeline({
      scrollTrigger: {
        trigger: project,
        scrub: 1,
        scroller: '.smoothScroll',
        //start: "left 70%",
        //end: "right 30%",
        start: () => 'left center+=' + window.innerHeight*0.4,
        end: () => 'right center-=' + window.innerHeight*0.4,
        invalidateOnRefresh: true,
        horizontal: true,
        //markers: true,
      }
    })
    .fromTo(bg, {
      x: '150vw',
      //x: () => { return (window.innerWidth*1.5) },
    },{
      x: '-150vw',
      //x: () => { return -(window.innerWidth*1.5) },
      ease:'none'
    })
    }

  
  // each time the window updates, we should refresh ScrollTrigger and then update LocomotiveScroll. 
  ScrollTrigger.addEventListener("refresh", () => locoScroll.update());

  // after everything is set up, refresh() ScrollTrigger and update LocomotiveScroll because padding may have been added for pinning, etc.
  ScrollTrigger.refresh();
    
});
!
999px

Console