#pointer {
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 25px solid transparent;
    border-right: 25px solid transparent;
    border-top: 40px solid red;
    z-index: 10;
  }
  #wheel-container {
    position: relative;
    display: inline-block;
  }