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<!DOCTYPE html>
<style>
.containing-block {
position: relative;
width: 150px;
height: 150px;
outline: 2px black solid;
}
.cell {
width: 50px;
height: 50px;
}
#anchor-cell {
position: absolute;
top: 50px;
left: 50px;
background: green;
}
.anchor-positioned-cell {
position: absolute;
}
#target-1 {
top: 0;
right: 0;
}
#target-2 {
bottom: 0;
left: 0;
}
#target-3 {
bottom: 0;
right: 0;
}
.blue-background {
background: blue;
}
.magenta-background {
background: magenta;
}
.cyan-background {
background: cyan;
}
</style>
<body>
<div class="containing-block">
<div class="cell" id="anchor-cell"></div>
<div class="cell anchor-positioned-cell" id="target-1">
<div class="cell blue-background"></div>
</div>
<div class="cell anchor-positioned-cell" id="target-2">
<div class="cell magenta-background"></div>
</div>
<div class="cell anchor-positioned-cell" id="target-3">
<div class="cell cyan-background"></div>
</div>
</div>
</body>