<!DOCTYPE html>
<style>
.container {
  position: relative;
  margin: 20px 0;
  width: 200px;
  height: 200px;
  border: solid 2px;
}

.result {
  position: absolute;
  background: green;
}
</style>
<div class="container">
  <div class="result" style="width: 100px; height: 100px; bottom: 0px;"></div>
</div>
<div class="container">
  <div class="result" style="width: 100px; height: 200px;"></div>
</div>
<div class="container">
  <div class="result" style="width: 100px; height: 100px;"></div>
</div>
<div class="container">
  <div class="result" style="width: 200px; height: 100px;"></div>
</div>
