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CSS

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HTML 

              
                <div class="run">
  <div class="footPrint">
    <div></div>
  </div>
  <div class="body-a">
    <div class="body-b">
      <div class="head"></div>
      <div class="body">
        <div class="left">
          <div class="hip">
            <div class="leg">
              <div class="knee">
                <div class="shank"></div>
              </div>
            </div>
          </div>
          <div class="sholder">
            <div class="arm">
              <div class="f-arm">
                <div class="hand">
                  <div class="finger"></div>
                </div>
              </div>
            </div>
          </div>
        </div>
        <div class="right">
          <div class="hip">
            <div class="leg">
              <div class="knee">
                <div class="shank"></div>
              </div>
            </div>
          </div>
          <div class="sholder">
            <div class="arm">
              <div class="f-arm">
                <div class="hand">
                  <div class="finger"></div>
                </div>
              </div>
            </div>
          </div>
        </div>
      </div>
    </div>
  </div>
</div>
!

CSS 

              
                .run {
  --t: 0.9s;
  --t2: calc(var(--t) * 0.5);
  --h: calc(var(--t) / 2);
  --h2: calc(var(--h) * -1);
  --h3: calc(var(--t) * 0.7);
  --r: 0.25;
}
@keyframes r {
  0% {
    transform: rotate(0);
  }
  100% {
    transform: rotate(calc(360 * var(--r) * -1deg));
  }
}
.run:hover {
  --t: 3s;
}
html {
  background-color: #005;
  background-image: linear-gradient(to top, #eef, #cce 30vh, #005 30vh, #005);
  background-repeat: no-repeat;
  min-height: 100vh;
}
body {
  overflow: hidden;
}
.run {
  position: absolute;
  left: 40%;
  top: 40%;
  font-size: 20vmin;
  height: 2em;
  width: 1em;
  cursor: pointer;
}
.run div {
  position: absolute;
  z-index: 1;
  background-color: inherit;
}
.run .head::before {
  content: "";
  display: block;
  background-color: #db7;
  position: absolute;
  width: 0.6em;
  height: 0.6em;
  left: 0%;
  top: 0%;
  transform-origin: 50% 52% 0;
  border-radius: 20% 40% 10% 10%;
  animation: r var(--t) infinite linear reverse;
  box-shadow: 0.15em 0.15em 0 0.05em #f00 inset,
    0.25em -0.01em 0 0.04em #eee inset, 0 -0.12em 0 -0.01em #ccc inset,
    0.25em 0.21em 0 0.02em #db7 inset, 0.2em 0.25em 0 0.05em #ddd inset,
    -0.34em 0.1em 0 -0.22em #db7 inset, -0.28em -0.2em 0 -0.22em #d00,
    -0.35em -0.25em 0 -0.24em #eee, 0.25em 0.125em 0 -0.2em #e95,
    0.2em 0.25em 0 -0.2em #eee, 0 0;
}
.run .head {
  width: 0.6em;
  height: 0.6em;
  left: 0.25em;
  top: -0.6em;
  background-color: hsla(0, 0%, 0%, 0);
  animation: r var(--t) infinite linear;
}
.run .body-a,
.run .body-b {
  --r: 1;
  top: 0;
  left: 0;
  width: 0.9em;
  height: 0.9em;
}
.run .body-a {
  animation: r var(--t) infinite linear;
}
.run .body-b {
  animation: r var(--t) infinite linear reverse;
  transform-origin: 55% 55% 0;
}
.run .body {
  --r: 0.25;
  width: 0.4em;
  height: 1.2em;
  left: calc(50% - 0.4em);
  top: -0.1em;
  transform-origin: center 0.01em 0;
  transform-origin: 55% 48% 0;
  transform: rotate(20deg);
}
.run .body::before {
  content: "";
  display: block;
  width: 0.9em;
  height: 0.9em;
  left: -0.7em;
  position: absolute;
  top: 0;
  border-radius: 50% 0 50% 50%;
  background-color: #fff;
  box-shadow: -0.2em -0.2em 0 -0.2em #aaa inset,
    -0.2em -0.1em 0 0.1em #ddd inset;
  --r: -0.05;
  animation: r var(--t) var(--h) infinite ease alternate;
}
.run .body > div {
  width: 100%;
  height: 100%;
  top: 0;
  border-radius: 10% 70% 10% 0;
  background-color: hsla(0, 80%, 40%, 1);
  box-shadow: 0.1em 0 0 0.01em hsla(0, 0%, 90%, 1);
}
.run .left {
  left: 0;
  z-index: -1;
}
.run .right {
  transform-origin: 0.2em top 0;
  z-index: 1;
  left: 0;
}
.run .sholder,
.run .hip,
.run .knee {
  width: 0.2em;
  height: 0.2em;
  left: calc(50% - 0.1em);
  background-color: hsla(0, 100%, 50%, 1);
  transform-origin: center center 0;
  border-radius: 40%;
}
.run .left .sholder,
.run .left .hip,
.run .left .knee {
  background-color: hsla(0, 100%, 40%, 1);
}
.run .sholder {
  top: -0em;
  left: 0.02em;
  transform: rotate(-30deg);
}
.run .arm {
  width: 0.5em;
  height: 0.2em;
  left: -0.4em;
  top: 0;
  transform-origin: right center 0;
  border-radius: 0.25em;
}
.run .f-arm {
  width: 0.45em;
  height: 0.2em;
  left: -0.4em;
  top: -0.1em;
  transform-origin: right center 0;
  border-radius: 0.25em;
}
.run .body::after,
.run .shank::after,
.run .f-arm::after {
  content: "";
  display: block;
  background-color: #ddd;
  height: 110%;
  width: 30%;
  position: absolute;
  left: 0;
  top: -5%;
  border-radius: 0.2em;
}
.run .shank::after,
.run .body::after {
  height: 15%;
  width: 180%;
  z-index: 10;
  left: -20%;
  top: auto;
  bottom: 0;
  border-radius: 0.2em;
}
.run .shank::after {
  background-color: #d00;
  height: 25%;
  left: -10%;
  bottom: 0%;
  border-radius: 0.05em 0.2em 0.05em 0.05em;
  box-shadow: -0.02em -0.09em 0 -0.04em #d11, -0.03em -0.1em 0 -0.04em #d22,
    -0.03em -0.15em 0 -0.03em #ddd, 0 0;
}
.run .hand {
  width: 0.1em;
  height: 0.2em;
  left: calc(0% - 0.05em);
  top: 0;
  border-radius: 10% 50% 50% 10%;
  background-color: hsl(20, 60%, 70%);
}
.run .finger {
  width: 0.1em;
  height: 0.18em;
  left: calc(0% - 0.1em);
  top: 0.02em;
  border-radius: 50% 0% 0% 50%;
}
.run .hip {
  top: 1.05em;
  transform: rotate(25deg);
}
.run .leg {
  width: 0.2em;
  height: 0.5em;
  left: 0;
  top: 0.1em;
  border-radius: 0.1em;
  transform-origin: center top 0;
}
.run .knee {
  top: 0.3em;
  transform: rotate(85deg);
}
.run .shank {
  width: 0.2em;
  height: 0.6em;
  left: 0;
  top: 0.1em;
  border-radius: 0.1em 0.1em 0 0;
  transform-origin: center top 0;
}
.run .arm {
  animation: r var(--t) var(--h2) infinite ease-in alternate;
}
.run .f-arm {
  transform: rotate(-0.3turn);
}
.run .leg {
  --r: 0.21;
  animation: r var(--t) var(--t2) infinite alternate
    cubic-bezier(0.91, 0.51, 0.15, 0.94);
}
.run .shank {
  --r: 0.23;
  animation: r var(--t) var(--h3) infinite alternate
    cubic-bezier(0.81, 0.51, 0.35, 0.64);
}
.run .right .leg {
  animation-delay: var(--h2);
}
.run .right .shank {
  animation-delay: calc(var(--t2) * -1);
}
.run .left .arm {
  --r: 0.28;
}
.run .right .arm {
  animation-delay: var(--t2);
}
.run .footPrint {
  width: var(--gw);
  height: var(--gw);
  bottom: -0.35em;
  left: calc(50% - var(--gh));
  transform-origin: center bottom 0;
  transform: rotateX(87deg);
  border-radius: 50%;
  --gw: 10em;
  --gh: calc(var(--gw)/2);
}
.run .footPrint div {
  width: 0.5em;
  height: 3em;
  top: 0;
  left: calc(50% - 0.5em);
  height: 100%;
  --delay: calc(var(--t) * 0.2 * -1);
  animation: r infinite var(--t) var(--delay) ease-in;
}
.run .footPrint div::before {
  content: "";
  display: block;
  width: 100%;
  height: 3em;
  border-radius: 50%;
  top: 0;
  left: 0;
  position: absolute;
  box-shadow: 0 0 0.3em hsla(200, 0%, 20%, 0.5);
}
!

JS 

              
                /*
while you hover on him, You can see him Slow motion.
*/
!
999px

Console