.DNA{
  transform: scale(0.3,0.3);
}
*,
*:before,
*:after {
  -webkit-box-sizing: border-box;
          box-sizing: border-box;
  margin: 0;
  padding: 0;
}

.DNA:after {
  letter-spacing: 5px;
  display: inline-block;
  padding-top: 100px;
  color: black;
  font-family: arial;
  text-align: center;
  font-size: 36pt;
  content: 'loading...';
}

.strain {
  width: 155px;
  height: 1px;
  background-color: #dbdbdb;
  position: relative;
  margin: 0px auto;
  margin-top: 28px;
  margin-bottom: 28px;
  -webkit-animation-name: rotate-strain;
          animation-name: rotate-strain;
  -webkit-animation-duration: 1.7s;
          animation-duration: 1.7s;
  -webkit-animation-timing-function: linear;
          animation-timing-function: linear;
  -webkit-animation-iteration-count: infinite;
          animation-iteration-count: infinite;
  -webkit-animation-play-state: running;
          animation-play-state: running;
}
.strain:before {
  content: "";
  display: block;
  position: absolute;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background-color: #13b6e2;
  left: 0;
  margin-top: -9px;
  margin-left: -9px;
  -webkit-animation-name: strain-size-left;
          animation-name: strain-size-left;
  -webkit-animation-duration: 1.7s;
          animation-duration: 1.7s;
  -webkit-animation-timing-function: linear;
          animation-timing-function: linear;
  -webkit-animation-iteration-count: infinite;
          animation-iteration-count: infinite;
  -webkit-animation-play-state: running;
          animation-play-state: running;
}
.strain:after {
  content: "";
  display: block;
  position: absolute;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background-color: #13b6e2;
  right: 0;
  margin-top: -9px;
  margin-right: -9px;
  -webkit-animation-name: strain-size-right;
          animation-name: strain-size-right;
  -webkit-animation-duration: 1.7s;
          animation-duration: 1.7s;
  -webkit-animation-timing-function: linear;
          animation-timing-function: linear;
  -webkit-animation-iteration-count: infinite;
          animation-iteration-count: infinite;
  -webkit-animation-play-state: running;
          animation-play-state: running;
}
.strain:nth-child(1), .strain:nth-child(1):before, .strain:nth-child(1):after {
  -webkit-animation-delay: 0.15s;
          animation-delay: 0.15s;
}
.strain:nth-child(2), .strain:nth-child(2):before, .strain:nth-child(2):after {
  -webkit-animation-delay: 0.3s;
          animation-delay: 0.3s;
}
.strain:nth-child(3), .strain:nth-child(3):before, .strain:nth-child(3):after {
  -webkit-animation-delay: 0.45s;
          animation-delay: 0.45s;
}
.strain:nth-child(4), .strain:nth-child(4):before, .strain:nth-child(4):after {
  -webkit-animation-delay: 0.6s;
          animation-delay: 0.6s;
}
.strain:nth-child(5), .strain:nth-child(5):before, .strain:nth-child(5):after {
  -webkit-animation-delay: 0.75s;
          animation-delay: 0.75s;
}
.strain:nth-child(6), .strain:nth-child(6):before, .strain:nth-child(6):after {
  -webkit-animation-delay: 0.9s;
          animation-delay: 0.9s;
}
.strain:nth-child(7), .strain:nth-child(7):before, .strain:nth-child(7):after {
  -webkit-animation-delay: 1.05s;
          animation-delay: 1.05s;
}
.strain:nth-child(8), .strain:nth-child(8):before, .strain:nth-child(8):after {
  -webkit-animation-delay: 1.2s;
          animation-delay: 1.2s;
}
.strain:nth-child(9), .strain:nth-child(9):before, .strain:nth-child(9):after {
  -webkit-animation-delay: 1.35s;
          animation-delay: 1.35s;
}
.strain:nth-child(10), .strain:nth-child(10):before, .strain:nth-child(10):after {
  -webkit-animation-delay: 1.5s;
          animation-delay: 1.5s;
}
.strain:nth-child(11), .strain:nth-child(11):before, .strain:nth-child(11):after {
  -webkit-animation-delay: 1.65s;
          animation-delay: 1.65s;
}
.strain:nth-child(12), .strain:nth-child(12):before, .strain:nth-child(12):after {
  -webkit-animation-delay: 1.8s;
          animation-delay: 1.8s;
}

@-webkit-keyframes rotate-strain {
  0% {
    width: 155px;
  }
  25% {
    width: 0;
  }
  50% {
    width: 155px;
  }
  75% {
    width: 0;
  }
  100% {
    width: 155px;
  }
}

@keyframes rotate-strain {
  0% {
    width: 155px;
  }
  25% {
    width: 0;
  }
  50% {
    width: 155px;
  }
  75% {
    width: 0;
  }
  100% {
    width: 155px;
  }
}
@-webkit-keyframes strain-size-left {
  0% {
    -webkit-transform: scale(1) translateX(0px);
            transform: scale(1) translateX(0px);
  }
  25% {
    -webkit-transform: scale(0.5);
            transform: scale(0.5);
  }
  50% {
    -webkit-transform: scale(1) translateX(155px);
            transform: scale(1) translateX(155px);
  }
  75% {
    -webkit-transform: scale(1.5);
            transform: scale(1.5);
  }
  100% {
    -webkit-transform: scale(1) translateX(0px);
            transform: scale(1) translateX(0px);
  }
}
@keyframes strain-size-left {
  0% {
    -webkit-transform: scale(1) translateX(0px);
            transform: scale(1) translateX(0px);
  }
  25% {
    -webkit-transform: scale(0.5);
            transform: scale(0.5);
  }
  50% {
    -webkit-transform: scale(1) translateX(155px);
            transform: scale(1) translateX(155px);
  }
  75% {
    -webkit-transform: scale(1.5);
            transform: scale(1.5);
  }
  100% {
    -webkit-transform: scale(1) translateX(0px);
            transform: scale(1) translateX(0px);
  }
}
@-webkit-keyframes strain-size-right {
  0% {
    -webkit-transform: scale(1) translateX(0px);
            transform: scale(1) translateX(0px);
  }
  25% {
    -webkit-transform: scale(1.5);
            transform: scale(1.5);
  }
  50% {
    -webkit-transform: scale(1) translateX(-155px);
            transform: scale(1) translateX(-155px);
  }
  75% {
    -webkit-transform: scale(0.5);
            transform: scale(0.5);
  }
  100% {
    -webkit-transform: scale(1) translateX(0px);
            transform: scale(1) translateX(0px);
  }
}
@keyframes strain-size-right {
  0% {
    -webkit-transform: scale(1) translateX(0px);
            transform: scale(1) translateX(0px);
  }
  25% {
    -webkit-transform: scale(1.5);
            transform: scale(1.5);
  }
  50% {
    -webkit-transform: scale(1) translateX(-155px);
            transform: scale(1) translateX(-155px);
  }
  75% {
    -webkit-transform: scale(0.5);
            transform: scale(0.5);
  }
  100% {
    -webkit-transform: scale(1) translateX(0px);
            transform: scale(1) translateX(0px);
  }
}