absolute positioning
HTML
<div class="outer">
<div class="inner first"></div>
<div class="inner second"></div>
<div class="inner third"></div>
</div>CSS
.outer {
width: 400px;
height: 400px;
background: pink;
position: relative;
}
.inner {
width: 100px;
height: 100px;
background: hotpink;
}
.second {
position: absolute;
left: 150px;
top: 150px;
}
.third {
position: absolute;
right: 0;
bottom: 0;
}