SOURCE

<div class="loading"><span>loging  </span>
  <div class="hex"></div>
  <div class="hex"></div>
  <div class="hex"></div>
  <div class="hex"></div>
  <div class="hex"></div>
  <div class="hex"></div>
  <div class="hex"></div>
</div>

html, body {
  background: #222;
  box-shadow: inset 0 0 180px rgba(0,0,0,0.5);
  width: 100%;
  height: 100%;
  
  background-image: url(https://unsplash.it/1000/500/?random);
  
  background-size: cover;
  background-position: center;
  background-color: red;
  background-blend-mode: multiply;
  
}

body:before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: red;
  background-blend-mode: screen;
  opacity: 0.2;
}

.loading {
  width: 100px;
  height: 100px;
  position: fixed;
  top: 50%;
  left: 50%;
  margin: -50px 0 0 -50px;
  border-radius: 50%;
  animation: fadeIn 2s 1 ;
  -webkit-animation-fill-mode: forwards;* Safari 4.0 - 8.0 */
 animation-fill-mode: forwards;
}

.loading span {
  color: #fff;
  display: block;
  top: 100%;
  position: absolute;
  font-size: 1.2em;
  width: 100%;
  font-family: 'Chathura', sans-serif;
  text-align: center;
  margin: 10px 0;
  letter-spacing: 0.3em;
}

.hex:nth-child(1) {
  top: 10px;
  left: 17px;
  animation-delay: 0.1s
}

.hex:nth-child(2) {
  top: 10px;
  left: 51px;
  animation-delay: 0.2s
}

.hex:nth-child(3) {
  top: 40px;
  left: 70px;
  animation-delay:0.3s
}

.hex:nth-child(4) {
  top: 70px;
  left: 51px;
  animation-delay:0.4s
}

.hex:nth-child(5) {
  top: 70px;
  left: 17px;
  animation-delay:0.5s
}

.hex:nth-child(6) {
  top: 40px;
  left: 0;
  animation-delay:0.6s
}

.hex:nth-child(7) {
  top: 40px;
  left: 35px;
  animation-delay:0.7s
}

.hex:nth-child(8) {
  top: 10px;
  left: 17px;
  animation-delay: 0.1s
}

.hex {
  position: absolute;
  width: 30px; 
  height: 20px;
  background-color: #fff;
  opacity: 0.2;
  animation: fade 1.5s infinite ease;
  box-shadow: 0 0 20px #fff, 0 0 20px #fff;
  opacity: 0.1;
}

.hex:before, .hex:after {
  position: absolute;
  content: "";
  width: 0;
  border-left: 15px solid transparent;
  border-right: 15px solid transparent;
}

.hex:before {
  border-bottom: 8px solid #fff;
  bottom: 100%;
}

.hex:after {
  width: 0; top: 100%; border-top: 8px solid #fff;
}

@keyframes fade {
  0% { opacity: 0.5; transform:scale(1); }
  7% { opacity: 0; transform:scale(0.2);}
  42% { opacity: 0; transform:scale(0.2);}
  49% { opacity: 0.5; transform:scale(1);}
  100% { opacity: 0.5;transform:scale(1); }
}

@keyframes fadeIn {
  0% { opacity: 0; }
  100% { opacity: 1; }
}