style.css

body {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background-color: #000;
}

.emoji-face {
    position: relative;
    width: 300px;
    height: 300px;
    background: rgb(251 255 15 / 79%);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: 0.5s;
}

.emoji-face::before {
  content: "";
  top: 180px;
  position: absolute;
  width: 150px;
  height: 70px;
  background: crimson;
  border-bottom-left-radius: 70px;
  border-bottom-right-radius: 70px;
  transition: 0.5s;
}

.eyes {
  position: relative;
  top: -40px;
  display: flex;
}

.eyes .eye {
  position: relative;
  width: 80px;
  height: 80px;
  display: block;
  background: white;
  border-radius: 50%;
  margin: 0 15px;
}

.eyes .eye::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 25px;
  transform: translate(-50%, -50%);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: black;
}