how to add with css image code example

Example 1: how to add an image in css

.element {
  background-image: url("imageFile.png");
}

Example 2: how to add images on images css

.parent {
  position: relative;
  top: 0;
  left: 0;
}
.image1 {
  position: relative;
  top: 0;
  left: 0;
  border: 1px red solid;
}
.image2 {
  position: absolute;
  top: 30px;
  left: 30px;
  border: 1px green solid;
}