#reader-wrapper {
  border: 1px solid black;
  border-left: 0;
  border-right: 0;
  font-size: 20px;
  width: 200px;
  height: 50px;
  margin: 20px auto;
  text-align: center;
}
#mark {
  border-left: 1px solid black;
  height: 50px;
  width: 1px;
  position: relative;
  float: left;
  left: 49%;
}
#reader {
  position: relative;
  margin-top: 10px;
  background-color: white;
  top: 13px;
}
#reader b {
  color: red;
  font-weight: normal;
}
#speed-wrapper {
  width: 250px;
  margin: 10px auto;
}
#link {
  text-align: center;
}

#text {
  margin: 20px auto;
  width: 300px;
  height: 200px;
  display: block;
}
#start, #stop, #restart {
  margin: 0 auto;
  display: block;
}