html,
body {
  width: 100%;
  margin: 0;
  padding: 20px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.loader {
  --path: #2f3545;
  --dot: #5628ee;
  --duration: 3s;
  --function: cubic-bezier(0.785, 0.135, 0.15, 0.86);
  width: calc(var(--dotSize) * 6);
  height: calc(var(--dotSize) * 6);
  margin: calc(var(--dotSize) * 6);
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.loader::after {
  content: '';
  width: var(--dotSize);
  height: var(--dotSize);
  border-radius: 50%;
  position: absolute;
  display: block;
  background-color: var(--dot);
  top: calc(var(--dotSize) * 6 - (var(--dotSize) / 2));
  left: calc(var(--dotSize) * 3 - (var(--dotSize) / 2));
  transform: translate(calc(var(--dotSize) * -3), calc(var(--dotSize) * -3));
  animation: dot var(--duration) var(--function) infinite;
}

.loader svg {
  display: block;
  width: 100%;
  height: 100%;
}

.loader svg rect,
.loader svg circle {
  fill: none;
  stroke: var(--path);
  stroke-width: 10px;
  stroke-linejoin: round;
  stroke-linecap: round;
  animation-duration: var(--duration);
  animation-timing-function: var(--function);
  animation-iteration-count: infinite;
}

svg rect {
  stroke-dasharray: 192 64 192 64;
  stroke-dashoffset: 0;
  animation-name: pathRect;
}

svg circle {
  stroke-dasharray: 150 50 150 50;
  stroke-dashoffset: 75;
  animation-name: pathCircle;
}

@keyframes dot {
  25% {
    transform: translate(0, 0);
  }

  50% {
    transform: translate(calc(var(--dotSize) * 3), calc(var(--dotSize) * -3));
  }

  75% {
    transform: translate(0, calc(var(--dotSize) * -6));
  }

  100% {
    transform: translate(calc(var(--dotSize) * -3), calc(var(--dotSize) * -3));
  }
}

@keyframes pathRect {
  25% {
    stroke-dashoffset: 64;
  }

  50% {
    stroke-dashoffset: 128;
  }

  75% {
    stroke-dashoffset: 192;
  }

  100% {
    stroke-dashoffset: 256;
  }
}

@keyframes pathCircle {
  25% {
    stroke-dashoffset: 125;
  }

  50% {
    stroke-dashoffset: 175;
  }

  75% {
    stroke-dashoffset: 225;
  }

  100% {
    stroke-dashoffset: 275;
  }
}