.test123{
    position:relative;
    min-height:1600px;
    outline:8px solid red;
}

.test123 > .media-left,
.test123 > .media-center,
.test123 > .media-right{
    position:absolute;
    outline:4px solid blue;
}

.test123 > .media-left{
    top:100px;
    left:60px;
}

.test123 > .media-center{
    top:650px;
    left:45%;
    transform:translateX(-50%);
}

.test123 > .media-right:first-of-type{
    top:50px;
    right:60px;
}

.test123 > .media-right:last-of-type{
    top:1200px;
    right:120px;
}