#contenedor {
  padding: 10px;
}

#contenedor .cuadro {
  width: 200px;
  height: 200px;
  background-color: blue;
  margin: 10px;
  display: inline-block;
}

#botones {
  margin-top: 20px;
  text-align: center;
}

button {
  padding: 10px 20px;
  margin: 0 10px;
  font-size: 16px;
  cursor: pointer;
}