how to set time interval for every 3000 in code example

Example 1: setinterval javascript

setInterval(function(){
  console.log("Hello");
  console.log("World");
}, 2000); //repeat every 2s

Example 2: settimeout function

setTimeout(function(){ 
$('#overlay'). modal('hide') 
}, 5000);
//#overlay will be the ID of modal which you want to hide or show modal