سلام ساخت loader با css و html خیلی ساده است، شاید صد‌ها نمونه مختلف از اون توی اینترنت باشه. باید با Css Animation ساخته بشه که حالت متحرک بگیره

من یک نمونش و براتون میزارم

<div class="loader-wrapper">
	<div class="loader">
    <div class="roller"></div>
    <div class="roller"></div>
  </div>
  
  <div id="loader2" class="loader">
    <div class="roller"></div>
    <div class="roller"></div>
  </div>
  
  <div id="loader3" class="loader">
    <div class="roller"></div>
    <div class="roller"></div>
  </div>
</div>

قسمت زیر هم برای css 

body {
  background-color: #55c1FA;
}

.loader-wrapper {
  width: 148px;
  height: 100px;
  position: absolute;
  margin: -50px 0 0 -74px;
  left: 50%;
  top: 60%;
}

.loader {
  width: 148px;
  height: 100px;
  top: 0;
  left: 0;
  position: absolute;
}
.loader:after {
  content: "";
  top: auto;
  position: absolute;
  display: block;
  animation: shadow 1.2s infinite linear;
  -moz-animation: shadow 1.2s infinite linear;
  bottom: 0em;
  left: 0;
  height: .25em;
  width: 1em;
  border-radius: 50%;
  background-color: #034466;
  opacity: 0.3;
}

.roller,
.roller:last-child {
  width: 70px;
  height: 70px;
  position: absolute;
  top: 0;
  left: 0;
  -webkit-animation: rollercoaster 1.2s infinite linear;
  -webkit-transform: rotate(135deg);
  -moz-animation: rollercoaster 1.2s infinite linear;
  -moz-transform: rotate(135deg);
  animation: rollercoaster 1.2s infinite linear;
  transform: rotate(135deg);
}

.roller:last-child {
  left: auto;
  right: 0;
  -webkit-transform: rotate(-45deg);
  -webkit-animation: rollercoaster2 1.2s infinite linear;
  -moz-transform: rotate(-45deg);
  -moz-animation: rollercoaster2 1.2s infinite linear;
  transform: rotate(-45deg);
  animation: rollercoaster2 1.2s infinite linear;
}

.roller:before,
.roller:last-child:before {
  content: "";
  display: block;
  width: 15px;
  height: 15px;
  background: #000;
  border-radius: 50%;
}

@-webkit-keyframes rollercoaster {
  0% {
    -webkit-transform: rotate(135deg);
  }
  8% {
    -webkit-transform: rotate(240deg);
  }
  20% {
    -webkit-transform: rotate(300deg);
  }
  40% {
    -webkit-transform: rotate(380deg);
  }
  45% {
    -webkit-transform: rotate(440deg);
  }
  50% {
    -webkit-transform: rotate(495deg);
    opacity: 1;
  }
  50.1% {
    -webkit-transform: rotate(495deg);
    opacity: 0;
  }
  100% {
    -webkit-transform: rotate(495deg);
    opacity: 0;
  }
}
@-webkit-keyframes rollercoaster2 {
  0% {
    opacity: 0;
  }
  49.9% {
    opacity: 0;
  }
  50% {
    opacity: 1;
    -webkit-transform: rotate(-45deg);
  }
  58% {
    -webkit-transform: rotate(-160deg);
  }
  70% {
    -webkit-transform: rotate(-240deg);
  }
  80% {
    -webkit-transform: rotate(-300deg);
  }
  90% {
    -webkit-transform: rotate(-340deg);
  }
  100% {
    -webkit-transform: rotate(-405deg);
  }
}
@-webkit-keyframes shadow {
  0% {
    opacity: .3;
    -webkit-transform: translateX(65px) scale(0.5, 0.5);
  }
  8% {
    -webkit-transform: translateX(30px) scale(2, 2);
  }
  13% {
    -webkit-transform: translateX(0px) scale(1.3, 1.3);
  }
  30% {
    -webkit-transform: translateX(-15px) scale(0.5, 0.5);
    opacity: 0.1;
  }
  50% {
    -webkit-transform: translateX(60px) scale(1.2, 1.2);
    opacity: 0.3;
  }
  60% {
    -webkit-transform: translateX(130px) scale(2, 2);
    opacity: 0.05;
  }
  65% {
    -webkit-transform: translateX(145px) scale(1.2, 1.2);
  }
  80% {
    -webkit-transform: translateX(120px) scale(0.5, 0.5);
    opacity: 0.1;
  }
  90% {
    -webkit-transform: translateX(80px) scale(0.8, 0.8);
  }
  100% {
    -webkit-transform: translateX(60px);
    opacity: 0.3;
  }
}
/* Moz */
@-moz-keyframes rollercoaster {
  0% {
    -moz-transform: rotate(135deg);
  }
  8% {
    -moz-transform: rotate(240deg);
  }
  20% {
    -moz-transform: rotate(300deg);
  }
  40% {
    -moz-transform: rotate(380deg);
  }
  45% {
    -moz-transform: rotate(440deg);
  }
  50% {
    -moz-transform: rotate(495deg);
    opacity: 1;
  }
  50.1% {
    -moz-transform: rotate(495deg);
    opacity: 0;
  }
  100% {
    -moz-transform: rotate(495deg);
    opacity: 0;
  }
}
@-moz-keyframes rollercoaster2 {
  0% {
    opacity: 0;
  }
  49.9% {
    opacity: 0;
  }
  50% {
    opacity: 1;
    -moz-transform: rotate(-45deg);
  }
  58% {
    -moz-transform: rotate(-160deg);
  }
  70% {
    -moz-transform: rotate(-240deg);
  }
  80% {
    -moz-transform: rotate(-300deg);
  }
  90% {
    -moz-transform: rotate(-340deg);
  }
  100% {
    -moz-transform: rotate(-405deg);
  }
}
@-moz-keyframes shadow {
  0% {
    opacity: .3;
    -moz-transform: translateX(65px) scale(0.5, 0.5);
  }
  8% {
    -moz-transform: translateX(30px) scale(2, 2);
  }
  13% {
    -moz-transform: translateX(0px) scale(1.3, 1.3);
  }
  30% {
    -moz-transform: translateX(-15px) scale(0.5, 0.5);
    opacity: 0.1;
  }
  50% {
    -moz-transform: translateX(60px) scale(1.2, 1.2);
    opacity: 0.3;
  }
  60% {
    -moz-transform: translateX(130px) scale(2, 2);
    opacity: 0.05;
  }
  65% {
    -moz-transform: translateX(145px) scale(1.2, 1.2);
  }
  80% {
    -moz-transform: translateX(120px) scale(0.5, 0.5);
    opacity: 0.1;
  }
  90% {
    -moz-transform: translateX(80px) scale(0.8, 0.8);
  }
  100% {
    -moz-transform: translateX(60px);
    opacity: 0.3;
  }
}
/* No-prefix */
@keyframes rollercoaster {
  0% {
    transform: rotate(135deg);
  }
  8% {
    transform: rotate(240deg);
  }
  20% {
    transform: rotate(300deg);
  }
  40% {
    transform: rotate(380deg);
  }
  45% {
    transform: rotate(440deg);
  }
  50% {
    transform: rotate(495deg);
    opacity: 1;
  }
  50.1% {
    transform: rotate(495deg);
    opacity: 0;
  }
  100% {
    transform: rotate(495deg);
    opacity: 0;
  }
}
@keyframes rollercoaster2 {
  0% {
    opacity: 0;
  }
  49.9% {
    opacity: 0;
  }
  50% {
    opacity: 1;
    transform: rotate(-45deg);
  }
  58% {
    transform: rotate(-160deg);
  }
  70% {
    transform: rotate(-240deg);
  }
  80% {
    transform: rotate(-300deg);
  }
  90% {
    transform: rotate(-340deg);
  }
  100% {
    transform: rotate(-405deg);
  }
}
@keyframes shadow {
  0% {
    opacity: .3;
    transform: translateX(65px) scale(0.5, 0.5);
  }
  8% {
    transform: translateX(30px) scale(2, 2);
  }
  13% {
    transform: translateX(0px) scale(1.3, 1.3);
  }
  30% {
    transform: translateX(-15px) scale(0.5, 0.5);
    opacity: 0.1;
  }
  50% {
    transform: translateX(60px) scale(1.2, 1.2);
    opacity: 0.3;
  }
  60% {
    transform: translateX(130px) scale(2, 2);
    opacity: 0.05;
  }
  65% {
    transform: translateX(145px) scale(1.2, 1.2);
  }
  80% {
    transform: translateX(120px) scale(0.5, 0.5);
    opacity: 0.1;
  }
  90% {
    transform: translateX(80px) scale(0.8, 0.8);
  }
  100% {
    transform: translateX(60px);
    opacity: 0.3;
  }
}
#loader2:after {
  -webkit-animation-delay: 0.15s;
  animation-delay: 0.15s;
}
#loader2 .roller {
  -webkit-animation-delay: 0.15s;
  animation-delay: 0.15s;
}

#loader3:after {
  -webkit-animation-delay: 0.3s;
  animation-delay: 0.3s;
}
#loader3 .roller {
  -webkit-animation-delay: 0.3s;
  animation-delay: 0.3s;
}