<div class="dots-1"></div>
<div class="dots-2"></div>
<div class="dots-3"></div>
<div class="dots-4"></div>
<div class="dots-5"></div>
<div class="dots-6"></div>
<div class="dots-7"></div>
<div class="dots-8"></div>
<div class="dots-9"></div>
<div class="dots-10"></div>

.dots-1 {
  width: 60px;
  aspect-ratio: 4;
  background: radial-gradient(circle closest-side,#000 90%,#0000) 0/calc(100%/3) 100% space;
  clip-path: inset(0 100% 0 0);
  animation: d1 1s steps(4) infinite;
}
@keyframes d1 {to{clip-path: inset(0 -34% 0 0)}}

.dots-2 {
  width: 60px;
  aspect-ratio: 4;
  background: radial-gradient(circle closest-side,#000 90%,#0000) 0/calc(100%/3) 100% no-repeat;
  animation: d2 1s steps(3) infinite;
}
@keyframes d2 {to{background-position: 150%}}

.dots-3 {
  width: 60px;
  aspect-ratio: 2;
  --_g: no-repeat radial-gradient(circle closest-side,#000 90%,#0000);
  background: 
    var(--_g) 0%   50%,
    var(--_g) 50%  50%,
    var(--_g) 100% 50%;
  background-size: calc(100%/3) 50%;
  animation: d3 1s infinite linear;
}
@keyframes d3 {
    20%{background-position:0%   0%, 50%  50%,100%  50%}
    40%{background-position:0% 100%, 50%   0%,100%  50%}
    60%{background-position:0%  50%, 50% 100%,100%   0%}
    80%{background-position:0%  50%, 50%  50%,100% 100%}
}

.dots-4 {
  width: 60px;
  aspect-ratio: 4;
  background: 
    radial-gradient(circle closest-side at left  6px top 50%,currentColor 90%,#0000),
    radial-gradient(circle closest-side                     ,currentColor 90%,#0000),
    radial-gradient(circle closest-side at right 6px top 50%,currentColor 90%,#0000);
  background-size:100% 100%;
  background-repeat: no-repeat;
  animation:d4 1s infinite alternate;
}
@keyframes d4 {
    to{width:25px;aspect-ratio: 1}
}

.dots-5 {
  width: 15px;
  aspect-ratio: 1;
  border-radius: 50%;
  animation: d5 1s infinite linear alternate;
}
@keyframes d5 {
    0%  {box-shadow: 20px 0 #000, -20px 0 #0002;background: #000 }
    33% {box-shadow: 20px 0 #000, -20px 0 #0002;background: #0002}
    66% {box-shadow: 20px 0 #0002,-20px 0 #000; background: #0002}
    100%{box-shadow: 20px 0 #0002,-20px 0 #000; background: #000 }
}

.dots-6 {
  width: 15px;
  aspect-ratio: 1;
  background: #000;
  border-radius: 50%;
  animation: d6 1s infinite linear alternate;
}
@keyframes d6 {
    0%  {box-shadow: 15px 0,-25px 0}
    50% {box-shadow: 15px 0,-15px 0}
    100%{box-shadow: 25px 0,-15px 0}
}

.dots-7 {
  width: 60px;
  aspect-ratio: 4;
  --_g: no-repeat radial-gradient(circle closest-side,#000 90%,#0000);
  background: 
    var(--_g) 0%   50%,
    var(--_g) 50%  50%,
    var(--_g) 100% 50%;
  background-size: calc(100%/3) 100%;
  animation: d7 1s infinite linear;
}
@keyframes d7 {
    33%{background-size:calc(100%/3) 0%  ,calc(100%/3) 100%,calc(100%/3) 100%}
    50%{background-size:calc(100%/3) 100%,calc(100%/3) 0%  ,calc(100%/3) 100%}
    66%{background-size:calc(100%/3) 100%,calc(100%/3) 100%,calc(100%/3) 0%  }
}
.dots-8 {
  width: 15px;
  aspect-ratio: 1;
  position: relative;
}
.dots-8::before,
.dots-8::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: #000;
}
.dots-8::before {
  box-shadow: -25px 0;
  animation: d8-1 1s infinite linear;
}
.dots-8::after {
  transform: rotate(0deg) translateX(25px);
  animation: d8-2 1s infinite linear;
}

@keyframes d8-1 {
    100%{transform: translateX(25px)}
}
@keyframes d8-2 {
    100%{transform: rotate(-180deg) translateX(25px)}
}

.dots-9 {
  width: 15px;
  aspect-ratio: 1;
  position: relative;
  animation: d9-0 1.5s infinite steps(2);
}
.dots-9::before,
.dots-9::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: #000;
}
.dots-9::before {
  box-shadow: 26px 0;
  transform: translateX(-26px);
  animation: d9-1 .75s infinite linear alternate;
}
.dots-9::after {
  transform: translateX(13px) rotate(0deg) translateX(13px);
  animation: d9-2 .75s infinite linear alternate;
}
@keyframes d9-0 {
    0% ,49.9% {transform: scale(1)}
    50%,100%  {transform: scale(-1)}
}
@keyframes d9-1 {
    100%{box-shadow: 52px 0}
}
@keyframes d9-2 {
    100%{transform: translateX(13px) rotate(-180deg) translateX(13px)}
}

.dots-10 {
  width: 15px;
  aspect-ratio: 1;
  position: relative;
}
.dots-10::before,
.dots-10::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: #000;
}
.dots-10::before {
  box-shadow: -26px 0;
  animation:d10-1 1.5s infinite linear;
}
.dots-10::after {
  transform: rotate(0deg) translateX(26px);
  animation:d10-2 1.5s infinite linear;
}
@keyframes d10-1 {
    50%{transform:translateX(26px)}
}
@keyframes d10-2 {
    100%{transform:rotate(-360deg) translateX(26px)}
}


/**/
body {
  display: grid;
  grid-template-columns: repeat(auto-fit,minmax(250px,1fr));
  grid-auto-rows: 130px;
  place-items:center;
}
* {
  box-sizing: border-box;
}