text: function contador() {
  
      var n1 = document.getElementById('inicio')
      var n2 = document.getElementById('fim')
      var n3 = document.getElementById('passo')
      var res = document.getElementById('res')
  
      
  
      if (n1.value.length == 0 || n2.value.length == 0 || n3.value.length == 0 ) {
          window.alert('[ERRO] Falta dados!')
      } else {
          res.innerHTML = 'Contando: ' 
          var i = Number(n1.value)
          var f = Number(n2.value)
          var p = Number(n3.value)
          if (i < f){
              for (var c = i; c <= f; c +=p){
                  res.innerHTML += `  ${c} \u{1F449}`
              }
          } else {
              for (var c = i; c >= f; c -= p){   
                  res.innerHTML += `  ${c} \u{1F449}`
              }               
          }
          res.innerHTML += ` \u{1F3C1}`
      }  
  }