JSFiddle - React, Tailwind, and code Playground

HTML

<div>1</div>
<div>2</div>
<div>3</div>
<div>4</div>
<div>5</div>
<div>6</div>
<div>7</div>
<div>8</div>
<div>9</div>
<div>10</div>
<div>11</div>
<div>12</div>
<div>13</div>
<div>14</div>
<div>15</div>

CSS

div {
  display: none;
  width: 200px;
  height: 30px;
  background: red;
  margin: 5px;
}

JavaScript

function show_item() {
	const items = document.querySelectorAll('div');
  const index = Math.floor(Math.random() * items.length);
  const visible_items = [];
  
  if(!visible_items.find(key => key === index)) {
  	items[index].style.display = 'block';
    
    return;
  }
 
  show_item(); 
  
}

setInterval(() => {
	show_item();
}, 3000);