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HTML 

              
                <body>
    <section class="principles">
        <div class="principles__container content-container">

            <div class="principles__scroll">
                <h2 class="principles__title">We Follow <span class = "marked">Agile Principles</span></h2>
                <div class="principles__counter">
                    <span class="principles__current">1</span> /
                    <span class="principles__total">10</span>
                </div>
                <div class="principles__list">
                    <div class="principles__item">
                        <span class="principles__number">01</span>
                        <p class="principles__description">Our highest priority is to satisfy the customer through early and continuous delivery of valuable software.</p>
                    </div>
                    <div class="principles__item">
                        <span class="principles__number">02</span>
                        <p class="principles__description">Welcome changing requirements, even late in development. Agile process harness change for the customer’s competitive advantage.</p>
                    </div>
                    <div class="principles__item">
                        <span class="principles__number">03</span>
                        <p class="principles__description">Deliver working software frequently, from a couple of weeks to a couple of months, with a preference to the shorter timescale.</p>
                    </div>
                    <div class="principles__item">
                        <span class="principles__number">04</span>
                        <p class="principles__description">Business and developers must work together daily throughout the project</p>
                    </div>
                    <div class="principles__item">
                        <span class="principles__number">05</span>
                        <p class="principles__description">Build projects around motivated individuals. Give them the environment and support they  need, and trust them to get the job done.</p>
                    </div>
                    <div class="principles__item">
                        <span class="principles__number">06</span>
                        <p class="principles__description">The most efficient and effective method of conveying information to and within a development team is face-to-face conversation.</p>
                    </div>
                    <div class="principles__item">
                        <span class="principles__number">07</span>
                        <p class="principles__description">Working software is the primary measure of progress.</p>
                    </div>
                    <div class="principles__item">
                        <span class="principles__number">08</span>
                        <p class="principles__description">Agile processes promote sustainable development. The sponsors, developers and users should be able to maintain a constant pace indefinitely.</p>
                    </div>
                    <div class="principles__item">
                        <span class="principles__number">09</span>
                        <p class="principles__description">Continuous attention to technical excellence and good design enhances agility.</p>
                    </div>
                    <div class="principles__item">
                        <span class="principles__number">10</span>
                        <p class="principles__description">The best architectures, requirements, and designs emerge from self-organizing teams.</p>
                    </div>
                </div>
            </div>
        </div>
    </section>
  
  <section class="spacer"></div>

    <script src='https://cdnjs.cloudflare.com/ajax/libs/gsap/3.8.0/gsap.min.js'></script>
    <script src='https://unpkg.com/gsap@3/dist/ScrollTrigger.min.js'></script>
    <script src="js/custom.js"></script>

</body>
!

CSS 

              
                body {
  margin: 0; 
  overflow-x: hidden;
}

.principles{
  padding: 60px 20px 120px;
  box-sizing: border-box;
}

.principles__container{
    margin: 0 auto;
    width: 100%;
    position: relative;
}
.principles__title{
    font-family: 'Montserrat', sans-serif;
    font-weight: bold;
    font-size: 42px;
    line-height: 54px;
    color: #1C2F6B;
    margin-bottom: 32px;
}

.principles__counter{
  position: absolute;
  right: 0;
  top: 0;
  font-family: 'Montserrat', sans-serif;
  font-weight: bold;
  font-size: 24px;
  line-height: 36px;
  color: #30C5FF;
}

.principles__list {
  display: flex;
  padding-left: calc(50vw - 370px/2);
}

.principles__item{
  background-color: #F5F9FF;
  min-width: 370px;
  padding: 32px;
  margin-left: 30px;
  //transition: .5s all ease;
  cursor: pointer;
  height: 290px;
  box-sizing: border-box;
}

.principles__item:first-of-type{
  margin-left: 0;
}

.principles__item:after {
  display: block;
  width: 100%;
  height: 100%;
  content: "";
  background-color: #1C2F6B;
  position: absolute;
  left: 0;
  top: 0;
  -webkit-transform-origin: 50% 100%;
  transform-origin: 50% 100%;
  -webkit-transform: scaleY(0);
  transform: scaleY(0);
  -webkit-transition: -webkit-transform .3s;
  transition: -webkit-transform .3s;
  transition: transform .3s;
  transition: transform .3s,-webkit-transform .3s;
  z-index: -1;
}

.principles__item.active:after {
  -webkit-transform: scaleY(1);
  transform: scaleY(1);
}

.principles__item:hover{
  background-color: #1C2F6B;
}
.principles__item:hover .principles__description,
.principles__item.active .principles__description{
  color: #fff;
}
.principles__number{
  color: #30C5FF;
  margin-bottom: 5px;
  font-size: 20px;
  font-weight: bold;
  font-family: 'Montserrat', sans-serif;
}
.principles__description{
  color: #1C2F6B;
  font-size: 20px;
  font-weight: bold;
  font-family: 'Montserrat', sans-serif;
  transition: .5s all ease;
}
!

JS 

              
                gsap.registerPlugin(ScrollTrigger);

const sections = gsap.utils.toArray(".principles__item");
let maxWidth = 0;

const getMaxWidth = () => {
  maxWidth = 0;
  sections.forEach((section) => {
    maxWidth += section.offsetWidth;
    maxWidth += gsap.getProperty(section, 'marginLeft');    
  });
  maxWidth += 20;  
  maxWidth += window.innerWidth;
  maxWidth -= sections[0].offsetWidth;  
  return maxWidth;
};

getMaxWidth();
ScrollTrigger.addEventListener("refreshInit", getMaxWidth);

gsap.set('section.spacer', { minHeight: window.innerHeight - document.querySelector('.principles').offsetHeight })

gsap.to(sections, {
  x: () => `-${maxWidth - window.innerWidth}`,
  ease: "none",
  scrollTrigger: {
    trigger: ".principles",
    pin: true,
    scrub: 0.5,
    markers: true,
    end: () => `+=${maxWidth}`,
    invalidateOnRefresh: true
  }
});

sections.forEach((sct, i) => {
  ScrollTrigger.create({
    trigger: sct,
    start: () => 'top top-=' + (sct.offsetLeft - window.innerWidth/2) * (maxWidth / (maxWidth - window.innerWidth)),
    end: () => '+=' + sct.offsetWidth * (maxWidth / (maxWidth - window.innerWidth)),
    toggleClass: {targets: sct, className: "active"}
  });
});
!
999px

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