SOURCE

function Person(name) {
    this.name = name;
}

const f = (function() {
    let p1;
    return function(name) {
        if(p1) {
            console.log(p1.name)
            return p1
        } else {
            return  p1 = new Person(name)
        }
    }
})();
let person1 = new f('ww');
let person2 = new f('dd');
console.log(person1 === person2)
console.log(person1.name)

<style>
  .stars {
    background-color: white;
    border-radius: 50%;
    animation-name: twinkle;
    animation-iteration-count: infinite;
  }

  .star-1 {
    margin-top: 5%; 
    margin-left: 80%;
    width: 5px;
    height: 5px;
    animation-duration: 0.5s;
  }

  .star-2 {
    margin-top: 10%; 
    margin-left: 60%;
    width: 6px;
    height: 6px;
    animation-duration: 1s;
  }
  .star-3 {
    margin-top: 5%; 
    margin-left: 80%;
    width: 8px;
    height: 8px;
    animation-duration: 1s;
  }
  .star-4 {
    margin-top: 0%; 
    margin-left: 30%;
    width: 10px;
    height: 10px;
    animation-duration: 1.5s;
  }
  .ball {
      float: left;
      width: 50px;
      height: 50px;
      margin-top: 5%;
      margin-left: 10%;
      background: linear-gradient(45deg, pink,green);
      border-radius: 50%;
      animation-name: ball;
      animation-iteration-count: infinite;
      animation-duration: 2s;
  }
  @keyframes ball {
      100% {
          margin-top: 100%;
          transform: scale(0.5);
          opacity: 0.5;
      }
  }
  @keyframes twinkle {
    20% {
      transform: scale(0.5);
      opacity: 0.5;
    }
  }
  
  #back {
    position: fixed;
    padding: 0;
    margin: 0;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(black, #000099, #66c2ff, #ffcccc, #ffeee6);
  }
</style>

<div id="back"></div>
<div class="ball"></div>
<div class="star-1 stars"></div>
<div class="star-2 stars"></div>
<div class="star-3 stars"></div>
<div class="star-4 stars"></div>

.box {
    width: 376px;
    height: 182px;
    background: rgb(179, 199, 209);
    border-radius: 4px;
}
.up {
    height: 50%;
    width: 100%;
    display: flex;
}
.up-left {
    width: 64px;
    display: flex;
    justify-content: center;
    align-items: center;
    background: #ddd;
}
.up-right {
    padding-top: 16px; 
    width: 100%;
    border-bottom: 1px solid red;
}