How do I animate say, dropping paint, in Edge?

I have 4 PNG files, that show drops of paint from a brush at various stages.

I want to display to the viewer a sequence of paint dripping off the brush, as if flipping a cartoon drawing book...

I have imported all four images and tried to stack them on top of each other, and manipulate the timeline, to get the images to display in the sequence above, but I have not had the luck I was seeking.

Any ideas?

I am new to Edge Animate (29 days left on the trial), and I have had 5+ years of experience with Flash.

Thanks!