JSFiddle - React, Tailwind, and code Playground

HTML

<div id="seg1">Iniciando...</div>

JavaScript

var num = 60;

function contador() { 
  num--; 
    document.getElementById('seg1').innerHTML='Queda: '+num; 
    
    if(num == 0){
        clearInterval(i);
        document.getElementById('seg1').innerHTML='acabĂł'; 
    }
}

var i = setInterval(contador, 1000);