how to use multiple images in one img tag in html

There is 3 Options for center div.

For that you need to create HTML first.

HTML

<div class="my_div">Hello</div>

CSS

.my_div{
  width:100px;
  height:100px;
  background:yellow;
  text-align:center;
  line-height:100px;
  position:absolute;
  top:50%;
  left:50%;
  margin-top:-50px;
  margin-left:-50px;
}