text: let timer;
  
  function cronometro() {
  
      let segundosHTML = document.getElementById("segundos");
      let minutosHTML = document.getElementById("minutos");
      let minutosHorasHTML = document.getElementById("minutos-horas");
      let horasHTML = document.getElementById("horas");
  
      if (parseInt(segundosHTML.innerHTML) < 59) {
          segundosHTML.innerHTML = parseInt(segundosHTML.innerHTML) + 1;
      } else {
          segundosHTML.innerHTML = 0;
          minutosHTML.innerHTML = parseInt(minutosHTML.innerHTML) + 1;
          minutosHorasHTML.innerHTML = parseInt(minutosHorasHTML.innerHTML) + 1;
          if (parseInt(minutosHorasHTML.innerHTML) === 60) {
              minutosHorasHTML.innerHTML = 0;
              horasHTML.innerHTML = parseInt(horasHTML.innerHTML) + 1;
          }
      }
  
  }
  
  function startStop() {
      
      startStopButton = document.getElementById("start-stop-button");
      if(startStopButton.innerHTML == "START") {
          timer = setInterval(cronometro, 1000);
          startStopButton.innerHTML = "STOP";
      } else {
          clearInterval(timer);
          startStopButton.innerHTML = "START";
      }
  }
  
  function resetar() {
      document.querySelectorAll(".conteudo").forEach((item) => item.innerHTML = 0);
  }
   
  