.frame {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 400px;
  height: 400px;
  margin-top: -200px;
  margin-left: -200px;
  border-radius: 2px;
  box-shadow: 1px 2px 10px 0px rgba(0, 0, 0, 0.3);
  overflow: hidden;
  background: #34495e;
  color: #fff;
  font-family: 'Open Sans', Helvetica, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.cradle {
  position: absolute;
  width: 200px;
  height: 40px;
  top: 140px;
  left: 100px;
  padding-top: 100px;
}
.cradle:before {
  content: '';
  display: block;
  position: absolute;
  width: 200px;
  height: 6px;
  top: 0;
  left: 0;
  border-radius: 3px;
  background: #bdc3c7;
}
.cradle .ball {
  position: relative;
  float: left;
  width: 40px;
  height: 40px;
  background: #fff;
  border-radius: 50%;
  -webkit-transform-origin: 50% -100px;
          transform-origin: 50% -100px;
}
.cradle .ball:before {
  content: '';
  display: block;
  position: absolute;
  height: 100px;
  width: 1px;
  top: -100px;
  left: 19px;
  background: #bdc3c7;
}
.cradle .ball-1 {
  -webkit-animation: ball-1 0.8s ease-out infinite alternate;
          animation: ball-1 0.8s ease-out infinite alternate;
}
.cradle .ball-5 {
  -webkit-animation: ball-5 0.8s ease-out .8s infinite alternate;
          animation: ball-5 0.8s ease-out .8s infinite alternate;
}

@-webkit-keyframes ball-1 {
  0%, 50% {
    -webkit-transform: rotate(0);
            transform: rotate(0);
  }
  100% {
    -webkit-transform: rotate(30deg);
            transform: rotate(30deg);
  }
}

@keyframes ball-1 {
  0%, 50% {
    -webkit-transform: rotate(0);
            transform: rotate(0);
  }
  100% {
    -webkit-transform: rotate(30deg);
            transform: rotate(30deg);
  }
}
@-webkit-keyframes ball-5 {
  0%, 50% {
    -webkit-transform: rotate(0);
            transform: rotate(0);
  }
  100% {
    -webkit-transform: rotate(-30deg);
            transform: rotate(-30deg);
  }
}
@keyframes ball-5 {
  0%, 50% {
    -webkit-transform: rotate(0);
            transform: rotate(0);
  }
  100% {
    -webkit-transform: rotate(-30deg);
            transform: rotate(-30deg);
  }
}