[Aetae]

Вот посложнее примерчик:

(function showNext(ids){
    if(ids) showNext.ids = ids;
    if(!showNext.ids.length) return;

    $(showNext.ids.shift()).delay(300).fadeIn(1000, showNext)
}([
    '#years_text1',
    '#years_text2',
    '#years_text3',
    '#years_text4'
]))