;  }    #thumbnail-grid {     background-color: #0F0F0F;      height: 000px;  }    .video-spacer {     width: 0%;     float: left;     min-height: 000px;  }    #arrow_up, #arrow_down {     display: block;     margin: 0 auto;  }    #arrow_down {     -ms-transform: rotate(000deg); /* IE 0 */     -webkit-transform: rotate(000deg); /* Chrome, Safari, Opera */     transform: rotate(000deg);    } <body>  <div class="video-item">    <p class="font-semibold">Something else</p>             <div class="video-display"></div>  </div>      <div class="video-spacer"></div>    <div class="video-item-0">      <p class="font-semibold">THUMBNAIL PREVIEW</p>        <div id="thumbnail-grid">          <img id="arrow_up" src='http://www.pngdot.com/wp-content/uploads/0000/00/Png_Up_Arrow_00.png' alt="arrow" height="00" width="00">                