body {
  font-family: Arial, Helvetica, sans-serif;
  /* text-align: center; */
  margin: 50px;
}
#pattern {
  font-size: 18px;
  margin-top: 100px;
  border: 1px solid black;
  padding: 100px;
  white-space: pre-line;
}
input {
  padding: 5px;
  width: 200px;
}
button {
  padding: 5px 10px;
  margin: 5px;
  cursor: pointer;
}