after content url code example
Example 1: css content image
DIV:before {
content: url(http://name.png);
}
Example 2: how use befor after for image
/* for child */
.custom_img:after {
content: "";
background-color: #2359cf;
height: 400px;
width: 70%;
top: -15px;
right: -6px;
position: absolute;
z-index: 999;
}