---

body {
  font-family: Times New Roman, serif;
}

.box {
  width: 800px;
  margin: 20px auto;
  border: 1px solid gray;
  padding: 20px;
}

h1 {
  text-align: center;
  color: blue;
}

h1 span {
  color: red;
}

.orange {
  color: orange;
  font-size: 28px;
}

.yellow {
  background: yellow;
}

.big {
  font-size: 24px;
  font-weight: bold;
  color: gold;
}

.purple {
  background: violet;
  color: white;
}

.green {
  background: lightgreen;
}

b {
  font-weight: bold;
}