.div-arrastar {
    background-color: white;
    width: 20px;
    height: 40px;
    border-radius: 15px;
    margin: 10px auto 25px auto;
    padding-top: 5px;
    padding-bottom: 5px;
    position: relative;
  }
  
  .div-bolinha {
    position: relative;
    height: 7px;
    width: 7px;
    border-radius: 5px;
    margin: auto;
    background-color: black;
    animation: MoveUpDown 2.5s linear infinite;
    left: auto;
  }
  
  @keyframes MoveUpDown {
    0%,
    100% {
      bottom: 0;
    }
    50% {
      bottom: -25px;
    }
  }