OnlineJudgeFE/static/css/loader.css

@-webkit-keyframes enter {
  0% {
    opacity: 0;
    top: -10px;
  }
  5% {
    opacity: 1;
    top: 0px;
  }
  50.9% {
    opacity: 1;
    top: 0px;
  }
  55.9% {
    opacity: 0;
    top: 10px;
  }
}
@keyframes enter {
  0% {
    opacity: 0;
    top: -10px;
  }
  5% {
    opacity: 1;
    top: 0px;
  }
  50.9% {
    opacity: 1;
    top: 0px;
  }
  55.9% {
    opacity: 0;
    top: 10px;
  }
}
@-moz-keyframes enter {
  0% {
    opacity: 0;
    top: -10px;
  }
  5% {
    opacity: 1;
    top: 0px;
  }
  50.9% {
    opacity: 1;
    top: 0px;
  }
  55.9% {
    opacity: 0;
    top: 10px;
  }
}
body {
  background: #f8f8f9;
}

#app-loader {
  position: absolute;
  left: 50%;
  top: 50%;
  margin-left: -27.5px;
  margin-top: -27.5px;
}
#app-loader .square {
  background: #2d8cf0;
  width: 15px;
  height: 15px;
  float: left;
  top: -10px;
  margin-right: 5px;
  margin-top: 5px;
  position: relative;
  opacity: 0;
  -webkit-animation: enter 6s infinite;
  animation: enter 6s infinite;
}
#app-loader .enter {
  top: 0px;
  opacity: 1;
}
#app-loader .square:nth-child(1) {
  -webkit-animation-delay: 1.8s;
  -moz-animation-delay: 1.8s;
  animation-delay: 1.8s;
}
#app-loader .square:nth-child(2) {
  -webkit-animation-delay: 2.1s;
  -moz-animation-delay: 2.1s;
  animation-delay: 2.1s;
}
#app-loader .square:nth-child(3) {
  -webkit-animation-delay: 2.4s;
  -moz-animation-delay: 2.4s;
  animation-delay: 2.4s;
  background: #ff9900;
}
#app-loader .square:nth-child(4) {
  -webkit-animation-delay: 0.9s;
  -moz-animation-delay: 0.9s;
  animation-delay: 0.9s;
}
#app-loader .square:nth-child(5) {
  -webkit-animation-delay: 1.2s;
  -moz-animation-delay: 1.2s;
  animation-delay: 1.2s;
}
#app-loader .square:nth-child(6) {
  -webkit-animation-delay: 1.5s;
  -moz-animation-delay: 1.5s;
  animation-delay: 1.5s;
}
#app-loader .square:nth-child(8) {
  -webkit-animation-delay: 0.3s;
  -moz-animation-delay: 0.3s;
  animation-delay: 0.3s;
}
#app-loader .square:nth-child(9) {
  -webkit-animation-delay: 0.6s;
  -moz-animation-delay: 0.6s;
  animation-delay: 0.6s;
}
#app-loader .clear {
  clear: both;
}
#app-loader .last {
  margin-right: 0;
}