"hover" effect on MC

Hi all, anyone have a little script lyinmg around that will allow for a movieclip to “hover” in place vertically - (like someone floating in a jetpack off the ground" – see attached …

Prefferably using a very small amount of processor ie ( setInterval instead of EnterFrame) - - Would be great to be able to set the vert, distance of hover and speed in a global somewhere…

If anyone can supply / take up the challenge of writing this - -much appreciated :slight_smile: