SOURCE

<section class="s1">
  <div data-left></div>
  <div data-mid></div>
  <div data-right></div>
</section>

<section>
  <section class="block" data-left></section>
  <section class="block" data-mid></section>
  <section class="block" data-right></section>
</section>

.s1 {
  overflow: hidden;
  margin-bottom: 50px;
}
div {
  float: left;
  width: 100px;
  height: 100px;
}

div[data-left] {
  background: red;
}
div[data-mid] {
  background: blue;
}
div[data-right] {
  background: green;
}

.block {
  position: absolute;
  width: 100px;
  height: 100px;
}

.block[data-left] {
  background: red;
}
.block[data-mid] {
  left: 100px;
  background: blue;
}
.block[data-right] {
  right: 0;
  background: green;
}