/*Modelo 1*/

.loader {
    width: 48px;
    height: 48px;
    border: 3px dotted #ADD8E6;
    border-style: solid solid dotted dotted;
    border-radius: 50%;
    display: inline-block;
    position: relative;
    box-sizing: border-box;
    animation: rotation 2s linear infinite;
}
.loader::after {
  content: '';  
  box-sizing: border-box;
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  margin: auto;
  border: 3px dotted #0000FF;
  border-style: solid solid dotted;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  animation: rotationBack 1s linear infinite;
  transform-origin: center center;
}
    
@keyframes rotation {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
} 
@keyframes rotationBack {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(-360deg);
  }
}


/*Modelo 2*/
.loader2 {
    width: 48px;
    height: 48px;
    display: inline-block;
    position: relative;
}

    .loader2::after,
    .loader2::before {
        content: '';
        box-sizing: border-box;
        width: 48px;
        height: 48px;
        border-radius: 50%;
        border: 2px solid #0000FF;
        position: absolute;
        left: 0;
        top: 0;
        animation: animloader 2s linear infinite;
    }

    .loader2::after {
        animation-delay: 1s;
    }

@keyframes animloader {
    0% {
        transform: scale(0);
        opacity: 1;
    }

    100% {
        transform: scale(1);
        opacity: 0;
    }
}