<div class="loading-box">
  <p class="loading-title">Loading</p>
  <div class="loading-circle">
    <p class="loading-count"><span id="loadingNumber">0</span>%</p>
  </div>
</div>

@import url('https://fonts.googleapis.com/css2?family=Quicksand:wght@300&display=swap');

html, body {
  width: 100%;
  height: 100%;
  padding: 0;
  margin: 0;
}

body {
  background: #1D1E22;
  display: flex;
  justify-content: center;
  align-items: center;
  font-family: 'Quicksand';
}

.loading-box {
  position: relative;
  width: 300px;
  height: 400px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  color: #F0F8FF;
  border-radius: 12px;
  box-shadow: 4px 4px 16px rgba(0, 0, 0, 0.5), -4px -4px 16px rgba(255, 255, 255, 0.05);
}

.loading-title {
  font-size: 1.5em;
  transform: translateY(-12px);
  text-transform: uppercase;
  letter-spacing: 4px;
  font-weight: 300;
}

.loading-circle {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 180px;
  height: 180px;
  background: conic-gradient(from 0deg at 50% 50%, rgba(111, 123, 247, 1) 0%, rgba(155, 248, 244, 1) 0%, #101012 0%);
  border-radius: 100px;
  box-shadow: 4px 4px 16px rgba(0, 0, 0, 0.75), -4px -4px 16px rgba(255, 255, 255, 0.1);
  animation: spin 1s infinite linear;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

.loading-count {
  content: ' ';
  display: flex;
  justify-content: center;
  align-items: center;
  top: 3px;
  left: 3px;
  width: 174px;
  height: 174px;
  border-radius: 100px;
  background: #1D1E22;
  box-shadow: 4px 4px 16px rgba(0, 0, 0, 0.75) inset, -4px -4px 16px rgba(255, 255, 255, 0.1) inset;
  animation: spin 1s infinite linear reverse;
}

.loading-count #loadingNumber {
  font-size: 4em;
}

const loadingNumber = document.querySelector('#loadingNumber');
const loadingCircle = document.querySelector('.loading-circle');
let load = 0;

setInterval(updateLoader, 150);

function updateLoader() {
  load += (load < 100);
  loadingNumber.innerHTML = load;
  loadingCircle.style.background = 'conic-gradient(from 0deg at 50% 50%, rgba(111, 123, 247, 1) 0%, rgba(155, 248, 244, 1) ' + load + '%, #101012 ' + load + '%)'
}