Ok, so I finally bump into a problem

I've just finished a banner and i've made 4 versions, which are not so different, they just have the snowflakes placed in some other place on the image... I want to make an animation of this 4 banners and I don't know how... I've been browsing the Photoshop Help Center for a while now, I've found something but not exactly what I want... So I thought I should get a little help from some more experimented users around here... Any idea on what shall I do? Thanks in advance!
