#progress-bar-wrapper {
  width: 100%;
  background-color: #999;
  border-radius: 5px;
  overflow: hidden;
  height: 30px;
  border: solid 1px black;
  text-align: center;
}
#progress-bar {
  height: 100%;
  background-color: #3c9f40; /* green */
  width: 0%; /* init */
  transition: width 0.3s ease;
}
#progress-bar:before {
  display: block;
  text-align: center;
  content: attr(percent);
  position: absolute;
  margin-top: 6px;
  left: 50%;
  transform: translate(-50%, 0%);
  -webkit-transform: translate(-50%, 0%);
  -ms-transform: translate(-50%, 0%);
  color: white;
}
#message {
  text-align:center;
  margin: 10px;
}