#progresscontainer {
  visibility: hidden;
  margin-top: 0px;
  width: 100%;
  border: 1px solid gray;
}

#progressbar {
  background-color: white;
  width: 100%;
}

#progressbar > div {
  background-color: white; /* Adjust with JavaScript */
  width: 0%; /* Adjust with JavaScript */
  height: 5px;
  border-radius: 10px;
}