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HTML 

              
                <div>
  <div class="main">
    <p class="label">Enter code from SMS</p>
    <!-- SMS Code input -->
      <div class="fieldset">
      <! –– container should be fieldset element but there is bug in Chromium https://bugs.chromium.org/p/chromium/issues/detail?id=262679 ––>
        <label class="box"><input class="field" type="text" placeholder="•" /></label>
        <label class="box"><input class="field" type="text" placeholder="•" /></label>
        <label class="box"><input class="field" type="text" placeholder="•" /></label>
        <label class="box"><input class="field" type="text" placeholder="•" /></label>
        <label class="box"><input class="field" type="text" placeholder="•" /></label>
    </div>
    <!-- End SMS Code input -->
  </div>
  <div class="animation-controls">
    <p class="label is-muted">States of animation</p>
    <div class="animation-controls__content">
      <button class="btn success-btn" type="button">Success</button>
      <button class="btn failure-btn" type="button">Failure</button>
      <button class="btn reset-btn" type="button">Reset</button>
    </div>
  </div>
  <div class="settings-controls">
    <p class="label is-muted">Animation duration settings (ms)</p>
    <div class="settings-controls__content">
      <div>
        <label class="settings-controls__label" for="step-1">Step 1:</label>
        <input id="step-1" name="step-1" class="settings-controls__input" data-step="1" type="text" placeholder="Value" value="450">
      </div>
      <div>
        <label class="settings-controls__label" for="step-2">Step 2:</label>
        <input id="step-2" name="step-2" class="settings-controls__input" data-step="2" type="text" placeholder="Value" value="300">
      </div>
      <div>
        <label class="settings-controls__label" for="step-3">Step 3:</label>
        <input id="step-3" name="step-3" class="settings-controls__input" data-step="3" type="text" placeholder="Value" value="450">
      </div>
    </div>
  </div>
</div>
!

CSS 

              
                :root {
  /* colors palette */
  --placeholder-color: hsl(240, 54%, 87%);
  --bg-color: hsl(240, 54%, 97%);
  --focus-color: hsla(240, 54%, 61%, 0.6);
  --shadow-color: hsla(240, 54%, 61%, 0.2);
  --text-color: hsl(0, 0%, 20%);
  --text-color-inversed: hsl(0, 0%, 95%);
  --success-color: hsl(145, 63%, 42%);
  --success-color-desaturated: hsl(145, 0%, 42%);
  --failure-color: hsl(0, 79%, 63%);
  
  /* border-radius */
  --border-radius: 6px;
  
  /* z-index */
  --z-index-xs: 1;
  --z-index-sm: 10;
  --z-index-md: 100;
  
  /* easing */
  --easing: cubic-bezier(0.25, 0.01, 0.25, 1);
  
  /* transition durations */
  --transition-duration-step-1: 450ms;
  --transition-duration-step-2: 300ms;
  --transition-duration-step-3: 300ms;
  
  /* transition delays */
  --transition-delay-step-2: calc(var(--transition-duration-step-1));
  --transition-delay-step-3: calc(
    var(--transition-duration-step-1) + var(--transition-duration-step-2)
  );
  
  /* transition properties */
  --transition-step-1: var(--transition-duration-step-1) var(--easing);
  --transition-step-2: var(--transition-duration-step-2) var(--easing)
    var(--transition-delay-step-2);
  --transition-step-3: var(--transition-duration-step-3) var(--easing)
    var(--transition-delay-step-3);
}

/* General styles */
*,
*::after,
*::before {
  box-sizing: border-box;
  font-family: Helvetica Neue;
}
body {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  width: 100vw;
  margin: 0;
}
.main {
  display: grid;
  justify-content: center;
}
.label {
  font-size: 14px;
  line-height: 15px;
  text-align: center;
  letter-spacing: 0.01em;
  color: var(--text-color);
}
.label.is-muted {
  color: #828282;
}
.animation-controls {
  margin-top: 55px;
}
.animation-controls__content {
  display: grid;
  grid-auto-flow: column;
  justify-content: center;
  gap: 6px;
}
.btn {
  min-width: 90px;
  padding: 9px 0;
  border: 0;
  border-radius: 6px;
  font-size: 14px;
  line-height: 15px;
  letter-spacing: 0.01em;
  font-weight: bold;
  cursor: pointer;
  transition: opacity 150ms ease-in;
}
.btn:hover,
.btn:focus {
  opacity: 0.7;
}
.btn:active {
  position: relative;
  top: 1px;
}
.btn.success-btn {
  color: #219653;
  background-color: #d3eadd;
}
.btn.failure-btn {
  color: #eb5757;
  background-color: #ffe9e0;
}
.btn.reset-btn {
  color: #6666d1;
  background-color: #f2f2f2;
}
.settings-controls {
  margin-top: 130px;
}
.settings-controls__content {
  display: grid;
  justify-content: center;
  gap: 18px;
}
.settings-controls__input {
  width: 67px;
  height: 33px;
  border: 0;
  border-radius: 6px;
  font-size: 14px;
  line-height: 15px;
  font-weight: bold;
  letter-spacing: 0.01em;
  color: #828282;
  background-color: #f2f2f2;
  text-align: center;
}
.settings-controls__label {
  font-size: 14px;
  line-height: 15px;
  letter-spacing: 0.01em;
  font-weight: bold;
  color: #828282;
}

@media (min-width: 768px) {
  .settings-controls__content {
    grid-auto-flow: column;
  }
}

/* SMS Code input styles */
/* base styles */

.fieldset {
  position: relative;
  display: grid;
  grid-auto-flow: column;
  justify-content: center;
  column-gap: 12px;
  border-radius: 6px;
  overflow: hidden;
  will-change: transform;
  /* make shadows of inner elements visible */
  padding: 6px;
  margin: -6px;
}
.fieldset::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 100%;
  transform: translateX(-100%);
}


.box {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 42px;
  width: 42px;
  border-radius: var(--border-radius);
  box-shadow: 0 0 6px 1px var(--shadow-color);
  overflow: hidden;
  will-change: transform;
}
.box:focus-within {
  box-shadow: 0 0 6px 1px var(--shadow-color), 0 0 0 2px var(--focus-color);
}
.box::before,
.box::after {
  content: "";
  position: absolute;
  height: 100%;
  width: 100%;
  top: 0;
  left: 0;
  border-radius: var(--border-radius);
  overflow: hidden;
}
.box::before {
  background: var(--bg-color);
  z-index: var(--z-index-xs);
  transition: background-color var(--transition-step-1);
}
.box::after {
  transform: translateY(100%);
  background-color: var(--success-color-desaturated);
  opacity: 0;
  z-index: var(--z-index-sm);
  transition: transform var(--transition-step-1),
    opacity var(--transition-step-1), background-color var(--transition-step-1);
}

.field {
  position: relative;
  border: 0;
  outline: 0;
  font-size: 25.21px;
  line-height: 42px;
  color: var(--text-color);
  background-color: transparent;
  text-align: center;
  z-index: var(--z-index-md);
}
.field::placeholder {
  color: var(--placeholder-color);
}

/* animate-success styles  */

.animate-success.fieldset {
  padding: 0;
  margin: 0;
}
.animate-success.fieldset::before {
  background-color: var(--success-color);
  transform: translateX(0);
  transition: transform var(--transition-step-2);
}

.animate-success > .box {
  box-shadow: none;
  transition: transform var(--transition-step-3);
}
.animate-success > .box:nth-child(1) {
  transform: translateX(24px);
}
.animate-success > .box:nth-child(2) {
  transform: translateX(12px);
}
.animate-success > .box:nth-child(4) {
  transform: translateX(-12px);
}
.animate-success > .box:nth-child(5) {
  transform: translateX(-24px);
}

.animate-success > .box::before {
  background-color: transparent;
}
.animate-success > .box::after {
  background-color: var(--success-color);
  transform: translateY(0);
  opacity: 1;
}

.animate-success > .box > .field, 
.animate-success > .box > .field::placeholder {
  color: var(--text-color-inversed);
  transition: color var(--transition-step-1);
}

/* animate-failure styles  */

.animate-failure.fieldset {
  animation-name: shaking;
  animation-duration: var(--transition-duration-step-2);
  animation-timing-function: var(--easing);
  animation-delay: var(--transition-delay-step-2);
}

.animate-failure > .box::before {
  background-color: transparent;
}
.animate-failure > .box::after {
  background-color: var(--failure-color);
  transform: translateY(0);
  opacity: 1;
}

.animate-failure > .box > .field,
.animate-failure > .box > .field::placeholder {
  color: var(--text-color-inversed);
  transition: color var(--transition-step-1);
}

@keyframes shaking {
  0%,
  100% {
    transform: translateX(0);
  }

  25%,
  75% {
    transform: translateX(10px);
  }

  50% {
    transform: translateX(-10px);
  }
}
/* End SMS Code input styles */
!

JS 

              
                const root = document.documentElement;

function getCustomPropertyValue(name) {
  const styles = getComputedStyle(root);
  return styles.getPropertyValue(name);
}

/* 
  SMS Code input logic
  primitive implementation of multi-input
  
  Disclaimer: this «pen» was made for presentational pruposes.
  It's not a production-ready solution, because it lacks of many best UX and a11y
  practices. Let it inspire you and I hope you will enjoy it :) 
*/

const fieldset = document.querySelector(".fieldset");
const fields = document.querySelectorAll(".field");
const boxes = document.querySelectorAll(".box");

function handleInputField({ target }) {
  const value = target.value.slice(0, 1);
  target.value = value;

  const step = value ? 1 : -1;
  const fieldIndex = [...fields].findIndex((field) => field === target);
  const focusToIndex = fieldIndex + step;

  if (focusToIndex < 0 || focusToIndex >= fields.length) return;

  fields[focusToIndex].focus();
}
fields.forEach((field) => {
  field.addEventListener("input", handleInputField);
});

/* End SMS Code input logic */

// Controls 
const successBtn = document.querySelector(".success-btn");
const failureBtn = document.querySelector(".failure-btn");
const resetBtn = document.querySelector(".reset-btn");

successBtn.addEventListener("click", (event) => {
  fieldset.classList.add("animate-success");
});
resetBtn.addEventListener("click", (event) => {
  fieldset.classList.remove("animate-failure");
  fieldset.classList.remove("animate-success");
});
failureBtn.addEventListener("click", (event) => {
  function getDelay() {
    const firstStepDuration = getCustomPropertyValue(
      "--transition-duration-step-1"
    );
    const secondStepDuration = getCustomPropertyValue(
      "--transition-duration-step-2"
    );

    return parseInt(firstStepDuration) + parseInt(secondStepDuration);
  }
  
  function animateFailure() {
    fieldset.classList.add("animate-failure");
    const delay = getDelay();

    setTimeout(() => {
      fieldset.classList.remove("animate-failure");
    }, delay);
  }
  
  if (fieldset.classList.contains("animate-success")) {
    fieldset.classList.remove("animate-success");
    
    const delay = parseInt(getCustomPropertyValue("--transition-duration-step-1"))
    
    setTimeout(() => {
      animateFailure();
    }, delay)
    
    return;
  } 
  
  animateFailure();
});

const inputs = document.querySelectorAll(".settings-controls__input");

function setAnimationDuration({ target }) {
  const {
    value,
    dataset: { step }
  } = target;
  const safeValue = parseInt(value);
  const propertyValue = Number.isNaN(safeValue) ? null : safeValue + "ms";

  root.style.setProperty(`--transition-duration-step-${step}`, propertyValue);
}
inputs.forEach((node) => {
  node.addEventListener("input", setAnimationDuration);
});
!
999px

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