<div class="filmstrip-container">
  <div class="filmstrip-inner">
    <div class="filmstrip-item"></div>
    <div class="filmstrip-item"></div>
    <div class="filmstrip-item"></div>
    <div class="filmstrip-item"></div>
    <div class="filmstrip-item"></div>
    <div class="filmstrip-item"></div>
    <div class="filmstrip-item"></div>
    <div class="filmstrip-item"></div>
    <div class="filmstrip-item"></div>
    <div class="filmstrip-item"></div>
    <div class="filmstrip-item"></div>
    <div class="filmstrip-item"></div>
    <div class="filmstrip-item"></div>
    <div class="filmstrip-item"></div>
    <div class="filmstrip-item"></div>
    <div class="filmstrip-item"></div>
    <div class="filmstrip-item"></div>
    <div class="filmstrip-item"></div>
    <div class="filmstrip-item"></div>
    <div class="filmstrip-item"></div>
    <div class="filmstrip-item"></div>
    <div class="filmstrip-item"></div>
    <div class="filmstrip-item"></div>
    <div class="filmstrip-item"></div>
    <div class="filmstrip-item"></div>
    <div class="filmstrip-item"></div>
  </div>
</div>

.filmstrip-container {
  width: 90%;
  height: 60px;
  margin: 0 auto;
  border: 1px solid #333;
}

.filmstrip-inner {
  width: 100%;
  height: 100%;
  overflow: visible;
}

.filmstrip-item {
  float: left;
  width: 73px;
  height: 58px;
  border: 1px solid #333;
  background-color: #accaff;
}

.filmstrip-item:nth-child(2n) {
  background-color: #acffca;
}