i {
  display: block;
  margin: 0 auto;
  height: 50px;
  width: 50px;
  border-radius: 50%;
  background: #fecf33;
  -webkit-animation: rotating 3s linear infinite;
  -moz-animation: rotating 3s linear infinite;
  -ms-animation: rotating 3s linear infinite;
  -o-animation: rotating 3s linear infinite;
  animation: rotating 3s linear infinite;
}
i::before {
  content: url("https://upload.wikimedia.org/wikipedia/commons/thumb/5/59/Radiation_warning_symbol2.svg/50px-Radiation_warning_symbol2.svg.png");
  position: absolute;
  top: 0px;
  left: 0px;
}
span {
  text-align: center;
  letter-spacing: 2px;
  display: block;
  color: #fecf33;
  font-family: 'Oswald', sans-serif;
  font-size: 30px;
  margin-top: 5px;
}
body {
  background: #222;
}
#div-sec {
  position: inherit;
}
#div-fir{
  width: auto;
  height: auto;
  margin-top: 100px;
}
@-moz-keyframes rotating {
  from {
    -ms-transform: rotate(0deg);
    -moz-transform: rotate(0deg);
    -webkit-transform: rotate(0deg);
    -o-transform: rotate(0deg);
    transform: rotate(0deg);
  }
  to {
    -ms-transform: rotate(360deg);
    -moz-transform: rotate(360deg);
    -webkit-transform: rotate(360deg);
    -o-transform: rotate(360deg);
    transform: rotate(360deg);
  }
}
@-webkit-keyframes rotating {
  from {
    -ms-transform: rotate(0deg);
    -moz-transform: rotate(0deg);
    -webkit-transform: rotate(0deg);
    -o-transform: rotate(0deg);
    transform: rotate(0deg);
  }
  to {
    -ms-transform: rotate(360deg);
    -moz-transform: rotate(360deg);
    -webkit-transform: rotate(360deg);
    -o-transform: rotate(360deg);
    transform: rotate(360deg);
  }
}
@-o-keyframes rotating {
  from {
    -ms-transform: rotate(0deg);
    -moz-transform: rotate(0deg);
    -webkit-transform: rotate(0deg);
    -o-transform: rotate(0deg);
    transform: rotate(0deg);
  }
  to {
    -ms-transform: rotate(360deg);
    -moz-transform: rotate(360deg);
    -webkit-transform: rotate(360deg);
    -o-transform: rotate(360deg);
    transform: rotate(360deg);
  }
}
@keyframes rotating {
  from {
    -ms-transform: rotate(0deg);
    -moz-transform: rotate(0deg);
    -webkit-transform: rotate(0deg);
    -o-transform: rotate(0deg);
    transform: rotate(0deg);
  }
  to {
    -ms-transform: rotate(360deg);
    -moz-transform: rotate(360deg);
    -webkit-transform: rotate(360deg);
    -o-transform: rotate(360deg);
    transform: rotate(360deg);
  }
}