.addheight {
  height: 900px;
}
.customheight {
  height:150px;
}
.customheight2 {
  height: 700px;
}
.margin-bottom{
  height: 100px;
  margin-top: 5%;
  margin-bottom: 5%;
  border-top: 5px solid red;
  border-bottom: 5px solid red;
}
h1{
  text-align: center;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 100px;
  font-weight: bold;
  color: red;
  padding-top: 5%;
  padding-bottom: 5%;
}
.middleheight{
  height: 300px;
}