body {
  font-family: "Comic Sans MS", cursive, sans-serif;
  background-color: #f0e68c;
  color: #000;
  margin: 0;
  padding: 20px;
}
header {
  text-align: center;
  font-size: 2em;
  margin-bottom: 20px;
}
.post {
  background-color: #fff;
  border: 2px dashed #000;
  padding: 10px;
  margin-bottom: 20px;
}
.wall {
  border: 3px dotted #ccc;
  padding: 10px;
  min-height: 200px;
}