2px;
    }
    .progress {
      width: 50vw;
      border: 1px solid black;
    }
    #progressbar {
      width: 0%;
      transition: width ease-out .5s;
      height: 1em;
      background-color: #888;
      background-image: linear-gradient(
        -45deg,
        rgba(255, 255, 255, .5) 25%,
        transparent 25%,
        transparent 50%,
        rgba(255, 255, 255, .5) 50%,
        rgba(255, 255, 255, .5) 75%,
        transparent 75%,
        transparent
      );
      background-size: 50px 50px;
