blog/_old/demo.css

body {
  min-height: 100vh;
  background-color: #008000;
  margin: 0;
}
.wrapper {
  background-color: #00f;
}
.primary {
  float: left;
  width: 80%;
  background-color: #ff0;
  min-height: 100px;
}
.primary img {
  height: 100px;
  width: 100px;
}
.secondary {
  float: right;
  width: 20%;
  background-color: #f00;
  min-height: 200px;
}
.secondary img {
  height: 500px;
  width: 100px;
}
.clearfix {
  clear: both;
}