const Maths = Math; // Yes, I'm that patriotic.
const hellos = ['Hewwo!', 'Hello!', 'Awoo!'];

function pickRandom(array) {
    return array[Maths.floor(Maths.random() * array.length)];
}

window.addEventListener('load', (e) => {
    const helloText = document.getElementById('helloText');
    helloText.innerText = pickRandom(hellos);
});