<div>
  <section class="content">
    <div class="poka-wrapper">
      <div class="poka-dot"></div>
      <div class="poka-dot"></div>
      <div class="poka-dot"></div>
      <div class="poka-dot"></div>
      <div class="poka-dot"></div>
    </div>
    <div class="title-wrapper">
      <p>Imagine if cash become digital</p>
    </div>
  </section>
  <section class="content">
    <div class="poka-wrapper">
      <div class="poka-dot"></div>
      <div class="poka-dot"></div>
      <div class="poka-dot"></div>
      <div class="poka-dot"></div>
    </div>
    <div class="title-wrapper">
      <p>Imagine if more animals had more access to the global economy.</p>
    </div>
  </section>
  <section class="content">
    <div class="poka-wrapper">
      <div class="poka-dot"></div>
      <div class="poka-dot"></div>
      <div class="poka-dot"></div>
    </div>
    <div class="title-wrapper">
      <p>Imagine a new global currency on a new global network.</p>
    </div>
  </section>
  <section class="content">
    <div class="poka-wrapper">
      <div class="poka-dot"></div>
      <div class="poka-dot"></div>
      <div class="poka-dot"></div>
      <div class="poka-dot"></div>
      <div class="poka-dot"></div>
    </div>
    <div class="title-wrapper">
      <p>We think this is how money should be.</p>
    </div>
  </section>
</div>

@import url('https://fonts.googleapis.com/css?family=Montserrat:600&display=swap');

body { 
  padding: 56px 0;
  margin: 0;
}

.pre-content {
  height: 550px;
}

.post-content {
  height: 750px;
}

.content {
  position: relative;
  overflow: initial;
  z-index: 1;
}

.title-wrapper {
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  z-index: 4;
  opacity: 0;
  transform: translate3d(0, 30px, 0);
  transition: opacity 666ms cubic-bezier(.17, .17, .06, 1), transform 1s cubic-bezier(.17, .17, .06, 1);
  p {
    font-size: 27px;
    font-weight: 600;
    font-family: 'Montserrat', sans-serif;
    text-align: center;
    padding: 0 15px;
    max-width: 730px;
    letter-spacing: -1px;
    @media screen and (min-width: 1024px) {
      font-size: 38px;
      font-weight: 600; 
    }
    
    @media screen and (min-width: 1280px) {
      font-size: 48px;
    }
    color: #000000;
  }
}

.poka-wrapper {
  height: 110%;
  overflow: hidden;
  position: absolute;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
  margin: auto;
  min-height: 650px;
  @media screen and (min-width: 768px) {
    min-height: 800px; 
  }
  @media screen and (min-width: 1024px) {
    min-height: 900px;
  }
  &.visible {
    & + .title-wrapper {
      opacity: 1;
      transform: translate3d(0, 0px, 0);
    }
    .poka-dot {
      transform: scale(1);
      &:nth-of-type(1){
        transition-delay: .075s; 
      }
      &:nth-of-type(2){
        transition-delay: .15s; 
      }
      &:nth-of-type(3){
        transition-delay: .225s; 
      }
      &:nth-of-type(4){
        transition-delay: .3s; 
      }
      &:nth-of-type(5){
        transition-delay: .375s; 
      }
    }
  }
}

.poka-dot {
  transform: scale(0);
  transition: transform .65s ease-in-out;
  background-size: cover;
  background-position: 50%;
  border-radius: 500px;
  position: absolute;
}

.content:nth-of-type(1) .poka-dot {
  &:nth-of-type(1) {
    background-image: url(https://ucarecdn.com/15378057-5bf1-46c5-b542-a21d1515ae69/photo1min.jpeg);
    width: 130px;
    height: 130px;
    left: 20px;
    top: 60px;
    @media screen and (min-width: 768px) {
       width: 190px;
       height: 190px;
       top: 130px;
       left: 40px;
    }
    
    @media screen and (min-width: 1280px) {
      left: 90px;
      top: 125px;
    }
    
    @media screen and (min-width: 1440px) {
      width: 273px; 
      height: 273px;
      left: 70px;
      top: 50px;
    }
  }
  
  &:nth-of-type(2) {
    width: 87px;
    height: 87px;
    right: 20px;
    top: 140px;
    background-image: url(https://ucarecdn.com/71781fe4-ae56-439a-a1c4-e49a0c56f562/photo2min.jpeg);
    @media screen and (min-width: 768px) {
      width: 125px;
      height: 125px;
      right: 55px;
      top: 240px;
    }
    
    @media screen and (min-width: 1280px) {
      right: 80px;
      top: 170px;
    }

    @media screen and (min-width: 1440px) {
      width: 180px;
      height: 180px;
      right: 66px;
      top: 160px;
    }
  }
  
  &:nth-of-type(3) {
    width: 132px;
    height: 132px;
    left: -65px;
    bottom: 140px;
    background-image: url(https://ucarecdn.com/d71ca026-d5a2-4017-a737-35008fe18697/photo3min.jpeg);
    @media screen and (min-width: 768px) {
      width: 190px;
      height: 190px;
      bottom: 250px;
      left: -85px;
    }
    
    @media screen and (min-width: 1280px) {
      bottom: 180px;
    }

    @media screen and (min-width: 1440px) {
      width: 360px;
      height: 360px;
      bottom: 200px;
      left: -180px;
    }
  }
  
  &:nth-of-type(4) {
    background-image: url(https://ucarecdn.com/c6d6beb7-57bf-4fe9-9307-7229028b7867/photo4min.jpeg);
    width: 200px;
    height: 99px;
    bottom: 100px;
    right: -130px;
    @media screen and (min-width: 768px) {
      width: 370px;
      height: 185px;
      bottom: 230px;
      right: -225px;
    }
    
    @media screen and (min-width: 1280px) {
      width: 412px;
      height: 226px;
      bottom: 152px;
      right: -270px;
    }
    
    @media screen and (min-width: 1440px) {
      height: 270px;
      bottom: 190px;
      right: -200px;
    }
  }
  
  &:nth-of-type(5) {
    width: 220px;
    height: 95px;
    left: 100px;
    bottom: 0;
    background-image: url(https://ucarecdn.com/f84a5a4a-7ea6-419f-b351-2828bc01c18f/photo5min.jpeg);
   background-position: 50% 35%;
    @media screen and (min-width: 768px) {
      width: 320px;
      height: 135px;
      left: 190px;
      bottom: 0;
    }
    
    @media screen and (min-width: 1280px) {
      height: 160px;
      bottom: 0;
      left: 160px;
    }
    
    @media screen and (min-width: 1440px) {
      width: 470px;
      height: 200px;
      bottom: 0;
      left: 120px;
    }
  }
}

.content:nth-of-type(2) .poka-dot {
  &:nth-of-type(1) {
    width: 129px;
    height: 129px;
    left: -40px;
    top: 140px;
    background-image: url(https://ucarecdn.com/ab1c202f-af3f-4d4f-ae6a-47aecfee6d1a/photo6.jpeg);
    @media screen and (min-width: 768px) {
      width: 200px;     
      height: 200px;
      left: 20px;
      top: 200px;
    }
    
    @media screen and (min-width: 1280px) {
      top: 120px;
    }
  }
  
  &:nth-of-type(2) {
    width: 90px;
    height: 90px;
    right: 20px;
    top: 100px;
    background-image: url(https://ucarecdn.com/de455031-ac7d-480a-a248-b34c33e94ff1/photo7.jpeg);
    background-position: 50%;
    @media screen and (min-width: 768px) {
      width: 125px;
      height: 125px;
      right: 50px;
      top: 200px;
    }
    
    @media screen and (min-width: 1280px) {
      right: 70px;
      top: 150px;
    }
  }
  
  &:nth-of-type(3) {
    width: 300px;
    height: 127px;
    bottom: 60px;
    left: -150px;
    background-image: url(https://ucarecdn.com/5356e331-4e49-41b7-8892-cc2c78497b53/photo8.jpeg);
    @media screen and (min-width: 768px) {
      width: 445px;
      height: 190px;
      bottom: 110px;
      left: -210px;
    }

    @media screen and (min-width: 1280px) {
      bottom: 80px;
    }
  }
  
  &:nth-of-type(4) {
    background-image: url(https://ucarecdn.com/5ff5e1a9-a334-4789-bd1a-14c944f0bd0c/photo9.jpeg);
    width: 140px;
    height: 140px;
    bottom: 130px;
    right: -20px;
    @media screen and (min-width: 768px) {
      width: 260px;
      height: 260px;
      bottom: 170px;
      right: -50px;
    }
    
    @media screen and (min-width: 1280px) {
      bottom: 90px;
    }
  }
}

.content:nth-of-type(3) .poka-dot {
  &:nth-of-type(1) {
    width: 135px;
    height: 135px;
    left: -20px;
    top: 100px;
    background-image: url(https://ucarecdn.com/fcd660ef-4533-4bb1-956a-ed0f1314e291/photo11.jpeg);
    @media screen and (min-width: 768px) {
      width: 225px;
      height: 225px;
      top: 190px;
    }
    
    @media screen and (min-width: 1280px) {
      left: -60px;
      top: 120px;
    }
    
    @media screen and (min-width: 1440px) {
      width: 300px;
      height: 300px;
    }
  }
  
  &:nth-of-type(2) {
    width: 140px;
    height: 140px;
    bottom: 60px;
    left: -20px;
    background-image: url(https://ucarecdn.com/1e98492f-83ed-4283-82d8-ed8b130c9fa8/photo12.jpeg);
    @media screen and (min-width: 768px) {
      width: 200px;
      height: 200px;
      bottom: 100px;
      left: 130px;
    }
    
    @media screen and (min-width: 1280px) {
      bottom: 0;
      left: 130px;
    }
    
    @media screen and (min-width: 1440px) {
      width: 225px;
      height: 225px;
    }
  }
  
  &:nth-of-type(3) {
    width: 110px;
    height: 110px;
    bottom: 150px;
    right: -20px;
    background-image: url(https://ucarecdn.com/5e578d5d-a67f-48d3-b6df-3b0dfed465cb/photo13.jpeg);
    @media screen and (min-width: 768px) {
      width: 195px;
      height: 195px;
      bottom: 250px;
      right: -40px;
    }
    
    @media screen and (min-width: 1280px) {
      bottom: 270px;
      right: -50px;
    }
    
    @media screen and (min-width: 1440px) {
      width: 225px;
      height: 225px;
    }
  }
}

.content:nth-of-type(4) .poka-dot {
  &:nth-of-type(1) {
    width: 300px;
    height: 120px;
    bottom: 0;
    left: -100px;
    background-image: url(https://ucarecdn.com/ea664804-6f50-4375-84d7-8ad993ea935d/photo14.jpeg);
    @media screen and (min-width: 768px) {
      width: 300px;
      height: 150px;
      bottom: 150px;
      left: 60px;
    }
    
    @media screen and (min-width: 1024px) {
      bottom: 140px;
      left: 20px;
    }
    
    @media screen and (min-width: 1280px) {
       width: 432px;
       height: 189px;
       bottom: 60px;
       left: 180px;
    }
  }
  
  &:nth-of-type(2) {
    width: 180px;
    height: 180px;
    right: -55px;
    top: 0;
    background-image: url(https://ucarecdn.com/a4af5081-3a00-4064-bc6d-deaad7add9bb/photo15.jpeg);
    @media screen and (min-width: 768px) {
      width: 220px;
      height: 220px;
      right: -55px;
      top: 80px;
    }
    @media screen and (min-width: 1024px) {
      right: -30px;
      top: 120px;
    }
    
    @media screen and (min-width: 1280px) {
      width: 252px;
      height: 252px;
      right: -35px;
      top: 30px;
    }
  }
  
  &:nth-of-type(3) {
    width: 100px;
    height: 100px;
    bottom: 180px;
    left: -45px;
    background-image: url(https://ucarecdn.com/4a15749e-9de5-484b-a7ce-7feaf046eb64/photo16.jpeg);
    @media screen and (min-width: 768px) {
      width: 100px;
      height: 100px;
      bottom: 55%;
      left: -25px;
    }
    
    @media screen and (min-width: 1024px) {
      bottom: 400px;
      left: -20px;
    }
    
    @media screen and (min-width: 1280px) {
      width: 144px;
      height: 144px;
    }
  }
  
  &:nth-of-type(4) {
    width: 140px;
    height: 140px;
    left: -40px;
    top: 80px;
    background-image: url(https://ucarecdn.com/3fc9f40d-ee74-4bec-90d3-59ae0db36df1/photo17.jpeg);
    @media screen and (min-width: 768px) {
      width: 160px;
      height: 160px;
      left: 40px;
    }
    @media screen and (min-width: 1024px) {
      top: 180px;
    }
    
    @media screen and (min-width: 1280px) {
      width: 216px;
      height: 216px;
      left: 120px;
      top: 20px;
    }
  }
  
  &:nth-of-type(5) {
    height: 112px;
    width: 260px;
    bottom: 110px;
    right: -98px;
    background-image: url(https://ucarecdn.com/140ff563-32ee-4d8b-b5f3-36408e664318/photo18.jpeg);
    @media screen and (min-width: 768px) {
      width: 325px;
      height: 140px;
      bottom: 240px;
      right: -130px;
    }
    @media screen and (min-width: 1024px) {
      bottom: 240px;
      right: -125px;
    }
    
    @media screen and (min-width: 1280px) {
      width: 465px;
      height: 200px;
      bottom: 150px;
      right: -170px;
    }
  }
}

const pokaWrappers = [].slice.call(document.querySelectorAll(".poka-wrapper"));
const messages = [].slice.call(document.querySelectorAll(".title-wrapper > p"));

const clearVisibleClassFromPokaWrappers = () => {
  pokaWrappers.forEach((pokaWrapper) => {
    if (pokaWrapper.classList.contains('visible')) {
      pokaWrapper.classList.remove('visible') 
    }
  });
};

const addVisibleClassToPokaWrapper = (index) => {
  console.log('index', index);
  clearVisibleClassFromPokaWrappers();
  if (!pokaWrappers[index].classList.contains("visible")) {
    pokaWrappers[index].classList.add("visible");
  }
};

const removeVisibleClassFromPokaWrapper = () => {
  if (pokaWrapper.classList.contains("visible")) {
    pokaWrapper.classList.remove("visible");
  }
};

const checkAndPlayPokaDotAnimation = () => {
  messages.forEach((message, index) => {
    const bounding = message.getBoundingClientRect();
    if (bounding.top >= 0 && bounding.top <= window.innerHeight) {
      addVisibleClassToPokaWrapper(index);
    }
    //   else {
    //   removeVisibleClassFromPokaWrapper();
    // }
  });
};

window.addEventListener("scroll", () => {
  requestAnimationFrame(checkAndPlayPokaDotAnimation);
});

requestAnimationFrame(checkAndPlayPokaDotAnimation);