A CodePen by fff.

index.haml

.fa
.fb
.fc
.fd
.fe

.clear

.fa.with3
.fb.with3
.fc.with3
.fd.with3
.fe.with3

style.css

div{
  margin: 10px;
  display: inline-block;
}
.clear{
  display: block;
}
.fa{
  border: black solid 10px;
  height: 130px;
  width: 130px;
}

.fb {
  border: black solid 30px;
  height: 90px;
  width: 90px;  
}

.fc {
  border: black solid 50px;
  width: 50px;
  height: 50px;
}

.fd {
  border: black solid 70px;
  width: 10px;
  height: 10px;
}

.fe {
  border: black solid 75px;
  width: 0px;
  height: 0px;
}

.with3{
  border-right: transparent;
}