<div id="wrap">

    <!-- section -->
    <div class="section">
      <div class="center">
        
        <div id="scroller">
          <div id="scroller-frame">
            <div id="scroller-block"></div>
          </div>
        </div>
        
      </div>
    </div>
    <!--/section -->

  </div>

html,
body {
  margin: 0;
  padding: 0;
  font-family: sans-serif;
  font-size: 16px;
  line-height: 1.4;
  color: #555;
  background: #fff;
}

* {
  box-sizing: border-box;
}

#wrap {
  position: relative;
}

.section {
  padding: 40px;
}

#scroller {
  width: 100%;
  height: 100px;
  background: #eee;
  overflow-x: scroll;
  
  &-frame {
    width: 5000px;
    height: 100%;
    background-image: repeating-linear-gradient(90deg, #aaa, #aaa 30px, #bbb 30px, #bbb 60px);
  }
  
  &-block {
    margin-left: 100px;
    width: 200px;
    height: 100%;
    position: sticky;
    left: 0;
    background: #000;
  }
}