pizza.css

body {
  width: 75%;
  margin: 0 auto;
  text-align: center;
  font-family: Helvetica, Verdana, Arial, sans-serif;
  overflow: hidden;
}

#main1 {
  /*z-index: 0;*/
  position:relative;
  /*width: 80%;*/
  max-height: 80%;
  margin-top: 40px;
}

@-webkit-keyframes rotating /* Safari and Chrome */ {
  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);
  }
}

.rotating-item {
    display: none;
    position: absolute;
    top: 0;
    left: 0;
    -webkit-animation: rotating 10s linear infinite;
    -moz-animation: rotating 10s linear infinite;
    -ms-animation: rotating 10s linear infinite;
    -o-animation: rotating 10s linear infinite;
    animation: rotating 10s linear infinite;
  }