.block-element {
  background-color: green;
  margin: 10px;
  padding: 20px;
}

.nav {
  background-color: peachpuff;
  padding: 20px;
  list-style: none;
  text-align: center;
}
.nav li {
  display: inline-block;
  font-size: 20px;
  margin: 10px 0;
  padding-left: 20px;
  padding-right: 20px;
}