<div class="grids">
      <div class="card-one">
        <div class="card">
          <div class="card__side card__side--front" id="front-1">
            <div class="text-box">
              <h3 class="text-box-top">Flipping Cards</h3>
              <h1 class="text-box-middle">Awesome!</h1>
              <h3 class="text-box-lower">--- More Text ---</h3>
            </div>
          </div>
          <div class="card__side card__side--back" id="back-1">
            <div class="text-box">
              <h3 class="text-box-top">Cards Flipped</h3>
              <h1 class="text-box-middle">Great!</h1>
              <h3 class="text-box-lower">--- More Text ---</h3>
            </div>
          </div>
        </div>
      </div>
      <div class="card-two">
        <div class="card">
          <div class="card__side card__side--front" id="front-2">
            <div class="text-box">
              <h3 class="text-box-top">Flipping Cards</h3>
              <h1 class="text-box-middle">Awesome!</h1>
              <h3 class="text-box-lower">--- More Text ---</h3>
            </div>
          </div>
          <div class="card__side card__side--back" id="back-2">
            <div class="text-box">
              <h3 class="text-box-top">Cards Flipped</h3>
              <h1 class="text-box-middle">Great!</h1>
              <h3 class="text-box-lower">--- More Text ---</h3>
            </div>
          </div>
        </div>
      </div>
      <div class="card-three">
        <div class="card">
          <div class="card__side card__side--front" id="front-3">
            <div class="text-box">
              <h3 class="text-box-top">Flipping Cards</h3>
              <h1 class="text-box-middle">Awesome!</h1>
              <h3 class="text-box-lower">--- More Text ---</h3>
            </div>
          </div>
          <div class="card__side card__side--back" id="back-3">
            <div class="text-box">
              <h3 class="text-box-top">Cards Flipped</h3>
              <h1 class="text-box-middle">Great!</h1>
              <h3 class="text-box-lower">--- More Text ---</h3>
            </div>
          </div>
        </div>
      </div>
      <div class="card-four">
        <div class="card">
          <div class="card__side card__side--front" id="front-4">
            <div class="text-box">
              <h3 class="text-box-top">Flipping Cards</h3>
              <h1 class="text-box-middle">Awesome!</h1>
              <h3 class="text-box-lower">--- More Text ---</h3>
            </div>
          </div>
          <div class="card__side card__side--back" id="back-4">
            <div class="text-box">
              <h3 class="text-box-top">Cards Flipped</h3>
              <h1 class="text-box-middle">Great!</h1>
              <h3 class="text-box-lower">--- More Text ---</h3>
            </div>
          </div>
        </div>
      </div>
      <div class="card-five">
        <div class="card">
          <div class="card__side card__side--front" id="front-5">
            <div class="text-box">
              <h3 class="text-box-top">Flipping Cards</h3>
              <h1 class="text-box-middle">Awesome!</h1>
              <h3 class="text-box-lower">--- More Text ---</h3>
            </div>
          </div>
          <div class="card__side card__side--back" id="back-5">
            <div class="text-box">
              <h3 class="text-box-top">Cards Flipped</h3>
              <h1 class="text-box-middle">Great!</h1>
              <h3 class="text-box-lower">--- More Text ---</h3>
            </div>
          </div>
        </div>
      </div>
      <div class="card-six">
        <div class="card">
          <div class="card__side card__side--front" id="front-6">
            <div class="text-box">
              <h3 class="text-box-top">Flipping Cards</h3>
              <h1 class="text-box-middle">Awesome!</h1>
              <h3 class="text-box-lower">--- More Text ---</h3>
            </div>
          </div>
          <div class="card__side card__side--back" id="back-6">
            <div class="text-box">
              <h3 class="text-box-top">Cards Flipped</h3>
              <h1 class="text-box-middle">Great!</h1>
              <h3 class="text-box-lower">--- More Text ---</h3>
            </div>
          </div>
        </div>
      </div>
      <div class="card-seven">
        <div class="card">
          <div class="card__side card__side--front" id="front-7">
            <div class="text-box">
              <h3 class="text-box-top">Flipping Cards</h3>
              <h1 class="text-box-middle">Awesome!</h1>
              <h3 class="text-box-lower">--- More Text ---</h3>
            </div>
          </div>
          <div class="card__side card__side--back" id="back-7">
            <div class="text-box">
              <h3 class="text-box-top">Cards Flipped</h3>
              <h1 class="text-box-middle">Great!</h1>
              <h3 class="text-box-lower">--- More Text ---</h3>
            </div>
          </div>
        </div>
      </div>
    </div>
@import url("https://fonts.googleapis.com/css?family=Rubik:400,700&display=swap");

*,
*::after,
*::before {
  margin: 0;
  padding: 0;
  box-sizing: inherit;
}

html {
  font-size: 48.5%;
}

body {
  background: orange;
  font-family: "Rubik", sans-serif;
  font-weight: 400;
  line-height: 1.7;
  padding: 3rem;
  box-sizing: border-box;
}

.grids {
  max-width: 136rem;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-column-gap: 3rem;
  grid-row-gap: 3rem;
}

.card-one {
  grid-column: 1/4;
}

.card-two {
  grid-column: 1/4;
}

.card-three {
  grid-column: 1/4;
}

.card-four {
  grid-column: 1/4;
}

.card-five {
  grid-column: 1/4;
}

.card-six {
  grid-column: 1/4;
}

.card-seven {
  grid-column: 1/4;
}

.card {
  perspective: 150rem;
  -moz-perspective: 150rem;
  position: relative;
  height: 25rem;
  width: 100%;
  transition: all ease-in-out 400ms;
  cursor: pointer;
}

.card:hover {
  transform: scale(1.05);
}

.card:active {
  transform: translateY(-1px);
}

.card__side {
  transition: all 0.8s ease;
  color: white;
  font-size: 2rem;
  position: absolute;
  top: 0;
  left: 0;
  height: 25rem;
  width: 100%;
  backface-visibility: hidden;
  box-shadow: 2px 4px 16px rgba(0, 0, 0, 0.4);
  border-radius: 8px;
}

.card__side--front {
  background-color: #2196f3;
  position: relative;
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
}

.card__side--back {
  background-color: #303f9f;
  transform: rotateY(180deg);
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
}

.showGreen {
  transform: rotateY(-180deg);
}

.showRed {
  transform: rotateY(0);
}

.text-box {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  width: 100%;
}

.text-box-top {
  font-size: 2.2rem;
  text-shadow: 2px 2px 10px #0000006c;
  font-weight: 400;
}

.text-box-middle {
  font-size: 5.5rem;
  font-weight: 700;
  text-shadow: 2px 2px 10px #0000006c;
}

.text-box-lower {
  font-size: 2rem;
  text-shadow: 2px 2px 10px #0000006c;
  font-weight: 400;
}

.heading {
  transition: all 0.6s linear;
}

.hide {
  visibility: hidden;
  opacity: 0;
}

.show {
  visibility: visible;
  opacity: 1;
}

#front-1 {
  background-image: linear-gradient(
      rgba(204, 30, 88, 0.6),
      rgba(20, 20, 20, 0.6)
    ),
    url("https://images.unsplash.com/photo-1527529482837-4698179dc6ce?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=600&q=80");
}

#front-2 {
  background-image: linear-gradient(
      rgba(31, 136, 168, 0.767),
      rgba(14, 46, 65, 0.9)
    ),
    url("https://images.unsplash.com/photo-1508599804355-8ce5238b44b1?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=600&q=80");
}

#front-3 {
  background-image: linear-gradient(
      rgba(84, 86, 175, 0.9),
      rgba(27, 27, 85, 0.9)
    ),
    url("https://images.unsplash.com/photo-1499914485622-a88fac536970?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=600&q=80");
}

#front-4 {
  background-image: linear-gradient(
      rgba(74, 190, 122, 0.767),
      rgba(6, 66, 48, 0.9)
    ),
    url("https://images.unsplash.com/photo-1531206715517-5c0ba140b2b8?ixlib=rb-1.2.1&auto=format&fit=crop&w=800&q=80");
}

#front-5 {
  background-image: linear-gradient(
      rgba(128, 74, 190, 0.767),
      rgba(42, 6, 66, 0.9)
    ),
    url("https://images.unsplash.com/photo-1522071820081-009f0129c71c?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=800&q=80");
}

#front-6 {
  background-image: linear-gradient(
      rgba(214, 21, 86, 0.801),
      rgba(20, 20, 20, 0.6)
    ),
    url("https://images.unsplash.com/photo-1491438590914-bc09fcaaf77a?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=800&q=80");
}

#front-7 {
  background-image: linear-gradient(
      rgba(31, 136, 168, 0.767),
      rgba(14, 46, 65, 0.9)
    ),
    url("https://images.unsplash.com/photo-1520881363902-a0ff4e722963?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=800&q=80");
}

/* Back */

#back-1 {
  background-image: linear-gradient(
      rgba(204, 30, 88, 0.6),
      rgba(20, 20, 20, 0.6)
    ),
    url("https://images.unsplash.com/photo-1527529482837-4698179dc6ce?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=600&q=80");
}

#back-2 {
  background-image: linear-gradient(
      rgba(31, 136, 168, 0.767),
      rgba(14, 46, 65, 0.9)
    ),
    url("https://images.unsplash.com/photo-1508599804355-8ce5238b44b1?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=600&q=80");
}

#back-3 {
  background-image: linear-gradient(
      rgba(84, 86, 175, 0.9),
      rgba(27, 27, 85, 0.9)
    ),
    url("https://images.unsplash.com/photo-1499914485622-a88fac536970?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=600&q=80");
}

#back-4 {
  background-image: linear-gradient(
      rgba(74, 190, 122, 0.767),
      rgba(6, 66, 48, 0.9)
    ),
    url("https://images.unsplash.com/photo-1531206715517-5c0ba140b2b8?ixlib=rb-1.2.1&auto=format&fit=crop&w=800&q=80");
}

#back-5 {
  background-image: linear-gradient(
      rgba(128, 74, 190, 0.767),
      rgba(42, 6, 66, 0.9)
    ),
    url("https://images.unsplash.com/photo-1522071820081-009f0129c71c?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=800&q=80");
}

#back-6 {
  background-image: linear-gradient(
      rgba(214, 21, 86, 0.801),
      rgba(20, 20, 20, 0.6)
    ),
    url("https://images.unsplash.com/photo-1491438590914-bc09fcaaf77a?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=800&q=80");
}

#back-7 {
  background-image: linear-gradient(
      rgba(31, 136, 168, 0.767),
      rgba(14, 46, 65, 0.9)
    ),
    url("https://images.unsplash.com/photo-1520881363902-a0ff4e722963?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=800&q=80");
}

@media screen and (min-width: 1024px) {
  html {
    font-size: 62.5%;
  }

  .grids {
    max-width: 136rem;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    grid-column-gap: 3rem;
    grid-row-gap: 3rem;
  }

  .card-one {
    grid-column: 1/3;
  }

  .card-two {
    grid-column: 3/4;
  }

  .card-three {
    grid-column: 1/2;
  }

  .card-four {
    grid-column: 2/2;
  }

  .card-five {
    grid-column: 3/4;
  }

  .card-six {
    grid-column: 1/2;
  }

  .card-seven {
    grid-column: 2/4;
  }
}
var flipCheck = 0;

function rotateCards() {
  if (flipCheck === 0) {
    document.getElementById("front-2").classList.add("showGreen");
    document.getElementById("back-2").classList.add("showRed");

    document.getElementById("front-1").classList.add("showGreen");
    document.getElementById("back-1").classList.add("showRed");

    flipCheck = 1;

    setTimeout(function () {
      document.getElementById("front-4").classList.add("showGreen");
      document.getElementById("back-4").classList.add("showRed");

      document.getElementById("front-3").classList.add("showGreen");
      document.getElementById("back-3").classList.add("showRed");

      document.getElementById("front-5").classList.add("showGreen");
      document.getElementById("back-5").classList.add("showRed");

      setTimeout(function () {
        document.getElementById("front-6").classList.add("showGreen");
        document.getElementById("back-6").classList.add("showRed");

        document.getElementById("front-7").classList.add("showGreen");
        document.getElementById("back-7").classList.add("showRed");
      }, 500);
    }, 500);
  } else {
    document.getElementById("front-2").classList.remove("showGreen");
    document.getElementById("back-2").classList.remove("showRed");

    document.getElementById("front-1").classList.remove("showGreen");
    document.getElementById("back-1").classList.remove("showRed");

    flipCheck = 0;

    setTimeout(function () {
      document.getElementById("front-3").classList.remove("showGreen");
      document.getElementById("back-3").classList.remove("showRed");

      document.getElementById("front-4").classList.remove("showGreen");
      document.getElementById("back-4").classList.remove("showRed");

      document.getElementById("front-5").classList.remove("showGreen");
      document.getElementById("back-5").classList.remove("showRed");

      setTimeout(function () {
        document.getElementById("front-7").classList.remove("showGreen");
        document.getElementById("back-7").classList.remove("showRed");

        document.getElementById("front-6").classList.remove("showGreen");
        document.getElementById("back-6").classList.remove("showRed");
      }, 500);
    }, 500);
  }
}

setInterval(rotateCards, 3000);

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.