var original = document.title, letters = ["E", "I", "G", "H", "T", "H", "D", "A", "Y"], cnt = 0, changeTitle;
window.onblur = function() {
    changeTitle = setInterval(animateTitle, 500)
}
function animateTitle() {
    document.title = letters[cnt],
    cnt < letters.length - 1 ? cnt++ : cnt = 0,
    document.querySelector("link[rel='shortcut icon']").href = "/assets/img/favicon/" + cnt + ".png"
}