js repeat loop every 5 seconds code example

Example 1: js loop every x seconds

(function loop() {
  setTimeout(function () {
    // execute script
    loop()
  }, 9000); //9000 = 9000ms = 9s
}());

Example 2: loop every 5 seconds

for(var i = 0; i < 3; i++) {
    (function(index) {
        setTimeout(function() { alert(index); }, index*5000);
    })(i);
}