<!DOCTYPE html>
<style>
table {
  border-collapse:collapse;
}

td {
  padding: 0;
}

td > div {
  height: 50px;
  width: 50px;
}

.group {
  display: inline-block;
  position: relative;
  width: 150px;
  height: 200px;
}

.indicator {
  position: absolute;
  background-color: green;
  left: 0;
  top: 150px;
  height: 50px;
  width: 50px;
}

</style>

<div class="group">
  <div>
    <div class="indicator"></div>
  </div>
</div>

<div>You should see a green box above. No red should be visible.</div>