.counter

@import url("https://fonts.googleapis.com/css2?family=Exo:wght@600&display=swap");

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  width: 100vw;
  min-height: 100vh;
  font-family: "Exo", Arial, sans-serif;
  background-color: #222;
  color: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 5vw;
  gap: 10px;
  
}

@property --milliseconds {
  inherits: false;
  initial-value: 0;
  syntax: '<integer>';
}


.counter {
  position: relative;
  counter-reset: ms var(--milliseconds);
  animation: count 100s steps(100) infinite;
}

.counter:after {
  content: counter(ms);
  color: hsl(0, 0%, 100%);
  font-weight: bold;
}

@keyframes count {
  to {
    --milliseconds: 100;
  }
}