<div class="wrapper">
  <div class="bouncing_ball">
    <div class="ball"></div>
  </div>
  <div class="spinner">
    <div class="curve_top_left"></div>
    <div class="curve_bottom_right"></div>
    <div class="curve_top_right"></div>
    <div class="curve_bottom_left"></div>
    <div class="center_circle"></div>
  </div>
  <h1 class="loading">LOADING<span class="dot_one"> .</span><span class="dot_two"> .</span><span class="dot_three"> .</span></h1>
</div>
* {
  box-sizing: border-box;
}
body {
  font-family: Palanquin;
  line-height: 1.618em;
  background: #3498db;
  color: #fff;
}
h1.loading {
  font-size: 3em;
  font-weight: 400;
  margin-left: 3rem;
}
span[class^='dot_'] {
  opacity: 0;
}
.dot_one {
  animation: dot_one 2s infinite linear;
}
.dot_two {
  animation: dot_two 2s infinite linear;
}
.dot_three {
  animation: dot_three 2s infinite linear;
}
.wrapper {
  max-width: 50rem;
  width: 100%;
  margin: 5rem auto 15rem auto;
  text-align: center;
}
.bouncing_ball {
  position: relative;
  width: 4rem;
  margin: 0 auto;
  height: 12rem;
}
.ball {
  width: 4rem;
  height: 4rem;
  border-radius: 50%;
  background: #fff;
  position: absolute;
  top: 0;
  animation: bounce 1s infinite;
}
.spinner {
  position: relative;
  width: 6rem;
  height: 6rem;
  margin: 6rem auto;
}
div[class^='curve_'] {
  position: absolute;
  transform: rotate(135deg);
  animation: spin 4s infinite;
}
.curve_top_left {
  width: 3rem;
  height: 3rem;
  border-top: 0.5rem solid #fff;
  border-left: 0.5rem solid #fff;
  border-top-left-radius: 200%;
  top: 0;
  left: 0;
  transform-origin: 100% 100%;
}
.curve_bottom_right {
  width: 3rem;
  height: 3rem;
  border-bottom: 0.5rem solid #fff;
  border-right: 0.5rem solid #fff;
  border-bottom-right-radius: 200%;
  bottom: 0;
  right: 0;
  transform-origin: 0% 0%;
}
.curve_top_right {
  width: 2rem;
  height: 2rem;
  border-top: 0.5rem solid #fff;
  border-right: 0.5rem solid #fff;
  border-top-right-radius: 200%;
  top: 1rem;
  right: 1rem;
  transform-origin: 0% 100%;
}
.curve_bottom_left {
  width: 2rem;
  height: 2rem;
  border-bottom: 0.5rem solid #fff;
  border-left: 0.5rem solid #fff;
  border-bottom-left-radius: 200%;
  bottom: 1rem;
  left: 1rem;
  transform-origin: 100% 0%;
}
.center_circle {
  width: 1.5rem;
  height: 1.5rem;
  background: #fff;
  border-radius: 50%;
  position: absolute;
  top: 2.25rem;
  left: 2.25rem;
  animation: pulse 2s infinite;
}
@keyframes dot_one {
  0% {
    opacity: 0;
  }
  15% {
    opacity: 0;
  }
  25% {
    opacity: 1;
  }
  100% {
    opacity: 1;
  }
}
@keyframes dot_two {
  0% {
    opacity: 0;
  }
  40% {
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  100% {
    opacity: 1;
  }
}
@keyframes dot_three {
  0% {
    opacity: 0;
  }
  65% {
    opacity: 0;
  }
  75% {
    opacity: 1;
  }
  100% {
    opacity: 1;
  }
}
@keyframes bounce {
  0% {
    top: 0;
    animation-timing-function: ease-in;
  }
  34% {
    height: 4rem;
    width: 4rem;
  }
  35% {
    top: 8rem;
    height: 3rem;
    width: 4.3rem;
    animation-timing-function: ease-out;
  }
  45% {
    height: 4rem;
    width: 4rem;
  }
  90% {
    top: 0;
  }
  100% {
    top: 0;
  }
}
@keyframes spin {
  0% {
    transform: rotate(135deg);
    opacity: 1;
  }
  25% {
    opacity: 0.75;
  }
  50% {
    transform: rotate(675deg);
    opacity: 1;
  }
  75% {
    opacity: 0.75;
  }
  100% {
    transform: rotate(135deg);
    opacity: 1;
  }
}
@keyframes pulse {
  0% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
  100% {
    opacity: 1;
  }
}

External CSS

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