h1 {
  text-align:center;
  font-size:30px;
}
img {
  border-width:medium;
  border-style:solid;
  border-color:red;
  margin:20px;
}
.intro {font-size:24px
}
p {
  font-size:20px;
  margin:20px
}
.div1 {
  margin:30px;
  border-width:medium;
  border-style:solid;
}
.div2 {
  margin:30px;
  border-width:medium;
  border-style:solid;
}
.div3 {
  margin:30px;
  border-width:medium;
  border-style:solid;
}
.div4 {
  margin:30px;
  border-width:medium;
  border-style:solid;
}
.conclusion {
  display:inline-block;
  position:relative;
  bottom:295px;
}