#wrapper{
  overflow: auto;
  position: relative;
}

#top {
  width: 100%;
  height: 150px;
  background-color: Green;
  text-align: center;
  font-family: Arial;
}

#bottom {
  content:"";
  clear:both;
  display:table;
  width: 100%;
  background: blue;
  text-align: center;
  font-family: monospace;
  font-size: 150%;
}

#middle {
  border-width: 4px;
  border-color: black;
  border-style: solid;
  border-radius: 25px;
  float: left;
  margin: 0% 5%;
  width: 33%;
  height: 300px;
  text-align: center;
}

#left {
  border-width: 2px;
  border-color: yellow;
  border-style: dashed;
  background-color: grey;
  float: left;
  margin: 2.5% 1%;
  padding: 25px 50px;
  width: 20%;
  text-align: left;
}

#right {
  border-width: 2px;
  border-color: red;
  border-style: double;
  background-color: grey;
  float: left;
  width: 23%;
  height: 300px;
  text-align: right;
}