JSFiddle - React, Tailwind, and code Playground

HTML

<div ng-app="myApp">
    <div ng-controller="myCtrl">
        Look at the console!
    </div>
</div>

JavaScript

angular.module('myApp',[])
.controller('myCtrl',function($scope,$interval){
    var getNextNumber = (function(){
        var i = 0;
        var numbers = [1,2,3,4,5,6,7];
        return function(){
            if(i >= numbers.length){
                i = 0;
            }
            return numbers[i++];
        };
    })();
    
    $interval(function(){
        var number = getNextNumber();
        console.log(number);
    },5000);
});