css计算机动画

这是我参与11月更文挑战的第3天，活动详情查看：11月更文挑战

<div class="wrap">
    <div class="comp">
        <div class="monitor">
            <div class="mid">
                <div class="site">
                    <div class="topbar">
                        <div class="cerrar">
                            <div class="circl"></div>
                            <div class="circl"></div>
                            <div class="circl"></div>
                        </div>
                    </div>
                    <div class="inhead">
                        <div class="mid">
                            <div class="item"></div>
                        </div>
                        <div class="mid txr">
                            <div class="item"></div>
                            <div class="item"></div>
                            <div class="item"></div>
                            <div class="item"></div>
                        </div>
                    </div>
                    <div class="inslid">

                    </div>
                    <div class="incont">
                        <div class="item"></div>
                        <div class="item"></div>
                        <div class="item"></div>
                        <div class="item"></div>
                        <div class="wid">
                            <div class="itwid">
                                <div>
                                    <div class="contfoot"></div>
                                </div>
                            </div>
                            <div class="itwid">
                                <div>
                                    <div class="contfoot"></div>
                                </div>
                            </div>
                            <div class="itwid">
                                <div>
                                    <div class="contfoot"></div>
                                </div>
                            </div>
                            <div class="clearfix"></div>
                        </div>
                        <div class="infoot">

                        </div>
                    </div>
                </div>
            </div>
            <div class="mid codigo">
                <div class="line">
                    <div class="item var"></div>
                    <div class="item cont"></div>
                    <div class="clearfix"></div>
                </div>
                <div class="line">
                    <div class="item min var"></div>
                    <div class="item min fun"></div>
                    <div class="clearfix"></div>
                </div>
                <div class="line">
                    <div class="item min var"></div>
                    <div class="clearfix"></div>
                </div>
                <div class="line">
                    <div class="item var"></div>
                    <div class="item atr"></div>
                    <div class="item cont"></div>
                    <div class="clearfix"></div>
                </div>
                <div class="line tab1">
                    <div class="item min atr"></div>
                    <div class="item lrg fun"></div>
                    <div class="item min fun"></div>
                    <div class="item lrg cont"></div>
                    <div class="clearfix"></div>
                </div>
                <div class="line tab1">
                    <div class="item lrg atr"></div>
                    <div class="item min fun"></div>
                    <div class="item min cont"></div>
                    <div class="clearfix"></div>
                </div>
                <div class="line tab1">
                    <div class="item atr"></div>
                    <div class="item min fun"></div>
                    <div class="item atr"></div>
                    <div class="clearfix"></div>
                </div>
                <div class="line tab1">
                    <div class="item min atr"></div>
                    <div class="item min cont"></div>
                    <div class="item lrg atr"></div>
                    <div class="item  fun"></div>
                    <div class="clearfix"></div>
                </div>
                <div class="line tab1">
                    <div class="item min atr"></div>
                    <div class="item lrg fun"></div>
                    <div class="item lrg cont"></div>
                    <div class="item min fun"></div>
                    <div class="clearfix"></div>
                </div>
                <div class="line tab1">
                    <div class="item min var"></div>
                    <div class="clearfix"></div>
                </div>
                <div class="line tab1">
                    <div class="item min var"></div>
                    <div class="clearfix"></div>
                </div>
                <div class="line tab2">
                    <div class="item min var"></div>
                    <div class="clearfix"></div>
                </div>
                <div class="line tab2">
                    <div class="item min atr"></div>
                    <div class="item min fun"></div>
                    <div class="clearfix"></div>
                </div>
                <div class="line tab3">
                    <div class="item min atr"></div>
                    <div class="item min fun"></div>
                    <div class="item lrg fun"></div>
                    <div class="item lrg cont"></div>
                    <div class="clearfix"></div>
                </div>
                <div class="line tab3">
                    <div class="item min atr"></div>
                    <div class="item min fun"></div>
                    <div class="item lrg atr"></div>
                    <div class="item lrg cont"></div>
                    <div class="clearfix"></div>
                </div>
                <div class="line tab4">
                    <div class="item min fun"></div>
                    <div class="item lrg atr"></div>
                    <div class="clearfix"></div>
                </div>
                <div class="line tab1">
                    <div class="item atr"></div>
                    <div class="item var"></div>
                    <div class="item cont"></div>
                    <div class="clearfix"></div>
                </div>
                <div class="line tab3">
                    <div class="item min var"></div>
                    <div class="clearfix"></div>
                </div>
                <div class="line tab4">
                    <div class="item min atr"></div>
                    <div class="item min fun"></div>
                    <div class="item lrg atr"></div>
                    <div class="item lrg cont"></div>
                    <div class="clearfix"></div>
                </div>
                <div class="line">
                    <div class="item min var"></div>
                    <div class="clearfix"></div>
                </div>

            </div>
        </div>
        <div class="base">

        </div>
    </div>
</div>

* html .clearfix {
  zoom: 1;
}

/* IE6 */
*:first-child + html .clearfix {
  zoom: 1;
}

/* IE7 */
.clearfix:before,
.clearfix:after {
  content: "";
  display: table;
}

.clearfix:after {
  clear: both;
}

.clearfix {
  zoom: 1;
  /* For IE 6/7 (trigger hasLayout) */
}

* {
  margin: 0;
  padding: 0;
  border: 0;
  box-sizing: border-box;
  -webkit-font-smoothing: antialiased;
}

a, a:hover, a:focus, a:active {
  text-decoration: none !important;
  outline: none;
}

.npd {
  padding: 0;
}

ul, li {
  padding: 0;
  margin: 0;
  list-style: none;
}

a:hover {
  opacity: 0.7;
  color: white;
}

body {
  font-size: 14px;
  color: black;
}

.clear {
  clear: both;
}

img {
  max-width: 100%;
}

h1, h2, h3, h4 {
  padding: 0;
  margin: 0;
}

.wrap {
  width: 100%;
  height: 100vh;
  position: relative;
  background-color: #22262b;
  display: flex;
  justify-content: center;
  align-items: center;
}

.comp {
  width: 100%;
  height: 194px;
  text-align: center;
}
.comp .monitor {
  width: 275px;
  height: 181px;
  display: block;
  margin: 0 auto;
  border-radius: 10px 10px 0px 0px;
  padding: 9px;
  border: solid 1px #e0e2e2;
  background-color: black;
}
.comp .mid {
  float: left;
  display: block;
  height: 100%;
  position: relative;
  background-color: #abadc6;
  width: 50%;
}
.comp .mid.codigo {
  background-color: #22262b;
}
.comp .site {
  overflow: hidden;
  position: absolute;
  width: 105px;
  height: 138px;
  bottom: 0;
  right: 0;
}
.comp .site .topbar {
  width: 100%;
}
.comp .site .cerrar {
  width: 100%;
  padding: 3px;
  line-height: 0;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  border-radius: 4px 4px 0px 0px;
  background-color: #afa895;
}
.comp .site .cerrar > div {
  display: inline-block;
  width: 2px;
  height: 2px;
  border-radius: 50%;
  background: white;
  margin: 0px 1px;
}
.comp .site .inhead {
  padding: 2px;
  height: 5px;
  background-color: #ddd8cf;
}
.comp .site .inhead .item {
  width: 10px;
  height: 1px;
  background-color: #d1c9bf;
  margin: 0 1px;
  display: block;
  float: left;
}
.comp .txr {
  text-align: right;
}
.comp .txr .item {
  float: right;
}
.comp .inslid {
  width: 100%;
  height: 33px;
  background-color: #efebe2;
}
.comp .incont {
  padding-top: 10px;
  background: #fefaf0;
}
.comp .incont .item {
  background-color: #d1c9bf;
  width: 53px;
  height: 2px;
  display: block;
  margin: 0 auto;
  margin-top: 1px;
}
.comp .incont .item:nth-child(1) {
  width: 20px;
}
.comp .incont .item:nth-child(2) {
  margin-top: 3px;
  width: 41px;
}
.comp .incont .item:nth-child(3) {
  width: 32px;
}
.comp .incont .item:nth-child(4) {
  width: 23px;
}
.comp .incont .wid {
  width: 100%;
  padding: 8px 1px;
}
.comp .incont .wid .itwid {
  width: 33.333%;
  float: left;
  height: 26px;
  padding: 0px 3px;
}
.comp .incont .wid .itwid > div {
  width: 100%;
  height: 100%;
  background-color: #f5f1e6;
  position: relative;
}
.comp .incont .wid .itwid > div .contfoot {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 6px;
  width: 100%;
  background-color: #ebe5dc;
}
.comp .incont .infoot {
  background-color: #efebe2;
  height: 26px;
  width: 100%;
}
@-webkit-keyframes code {
  0% {
    opacity: 1;
  }
  50% {
    opacity: 0.6;
  }
  100% {
    opacity: 1;
  }
}
@keyframes code {
  0% {
    opacity: 1;
  }
  50% {
    opacity: 0.6;
  }
  100% {
    opacity: 1;
  }
}
.comp .codigo {
  padding: 14px 0px 14px 14px;
}
.comp .codigo .var {
  background-color: #ac5e47;
  -webkit-animation: code;
          animation: code;
  -webkit-animation-duration: 0.3s;
          animation-duration: 0.3s;
  -webkit-animation-iteration-count: infinite;
          animation-iteration-count: infinite;
}
.comp .codigo .cont {
  background-color: #464748;
  -webkit-animation: code;
          animation: code;
  -webkit-animation-duration: 0.5s;
          animation-duration: 0.5s;
  -webkit-animation-iteration-count: infinite;
          animation-iteration-count: infinite;
}
.comp .codigo .fun {
  background-color: #fbb053;
  -webkit-animation: code;
          animation: code;
  -webkit-animation-duration: 0.2s;
          animation-duration: 0.2s;
  -webkit-animation-iteration-count: infinite;
          animation-iteration-count: infinite;
}
.comp .codigo .atr {
  background-color: #645572;
  -webkit-animation: code;
          animation: code;
  -webkit-animation-duration: 0.1s;
          animation-duration: 0.1s;
  -webkit-animation-iteration-count: infinite;
          animation-iteration-count: infinite;
}
.comp .codigo .item {
  height: 3px;
  width: 20px;
  float: left;
  margin-right: 3px;
}
.comp .codigo .item.min {
  width: 13px;
}
.comp .codigo .item.lrg {
  width: 30px;
}
.comp .codigo .line {
  padding: 2px 0;
  width: 100%;
}
.comp .codigo .tab1 {
  padding-left: 5px;
}
.comp .codigo .tab2 {
  padding-left: 8px;
}
.comp .codigo .tab3 {
  padding-left: 10px;
}
.comp .codigo .tab4 {
  padding-left: 12px;
}

.base {
  width: 338px;
  height: 12px;
  background: #e0e2e2;
  display: block;
  margin: 0 auto;
  border-radius: 0px 0px 6px 6px;
}