body {
  background-color: white;
}

header.mybox {
  color: black;
	font-family: arial;
  font-size: 200%;
	text-align: center;
  background-color: orange;
  padding: 12px;
}

p.mybox {
  color: black;
  font-family: arial;
  font-size: 110%;
  padding: 5px;]
}

div.mybox {
  width: 100%;
  border: 2px solid black;
}