text: function contar() {
      let saida = document.getElementById('saida')
  
      saida.innerHTML += `<h2>Contagem Regressiva de 10 a 1</h2>`
      let cont = 10
      while (cont >= 1) {
          saida.innerHTML += ` ${cont} &#x1F449;`
          cont -- // Corresponde a cont = cont - 1
      }
      saida.innerHTML += ` &#x1F3C1;`
  }