adamsAnimals.js

if (Meteor.isClient) {

    var previousNr; // used in 'click' function to prevent the same picture showing again

    Template.hello.helpers({
        counter: function () {}
    });

    Template.hello.events({
        'click': function () {
            var myPix = new Array("bear", "bee", "cat", "cow", "dog", "duck",
                "elephant", "fox", "goat", "hippo", "lion",
                "monkey", "mosquito", "mouse", "owl", "parrot",
                "pig", "polar-bear", "rabbit", "squirrel", "tiger");

            var randomNr = Math.floor((Math.random() * myPix.length));
            while (previousNr == randomNr) {
                var randomNr = Math.floor((Math.random() * myPix.length));
            }
            document.getElementById("myPicture").src = ((myPix[randomNr]) + ".jpg");
            previousNr = randomNr;

            var soundFile = ((myPix[randomNr]) + ".mp3")

            // http://goldfirestudios.com/blog/104/howler.js-Modern-Web-Audio-Javascript-Library
            // how to add it to meteor: https://atmospherejs.com/ovcharik/howler
            var sound = new Howl({
                urls: [soundFile]
            }).play();


        }
    });
}

if (Meteor.isServer) {
    Meteor.startup(function () {
        // code to run on server at startup
    });
}