SOURCE

<div class="wrap">
  <div class="loading">
    <div class="bounceball"></div>
    <div class="text">NOW LOADING</div>
  </div>
</div>

:root{
    --height: 15px;
    --width: 15px;
    --bounce_height: 30px;
}


body {
  position: relative; 
  width: 100%;
  height: 100vh;
  font-family: Montserrat;
}

.wrap {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.text {
  color: #fbae17;
  display: inline-block;
  margin-left: 5px;
}

.bounceball {
  position: relative;
  display: inline-block;
  height: 37px;
  width: var(--width);
}
.bounceball:before {
    position: absolute;
    content: '';
    display: block;
    top: 0;
    width: var(--width);
    height: var(--height);
    border-radius: 50%;
    background-color: #fbae17;
    transform-origin: 50%;
    animation: bounce 500ms alternate infinite ease;
  }

@keyframes bounce {
  0% {
    top: var(--bounce_height);
    height: 5px;
    border-radius: 60px 60px 20px 20px;
    transform: scaleX(2);
  }
  35% {
    height: var(--height);
    border-radius: 50%;
    transform: scaleX(1);
  }
  100% {
    top: 0;
  }
}