How do I get a button working on mobile?

Ok, so I know that the subject sounds incredibly dumb, but I couldn't fit exactly what I needed help with into a few words...

What I really need help with is finding out how to make an invisible button (or sprite that acts as a button) that has an event triggered every so many seconds that the button/sprite is being held down. Specifically, I'm making a side-scrolling airplane/dogfight game, and I want it to be playable on mobile devices. I already have it so that the start screen can tell whether to load in the mobile or keyboard layout for the full game, but I can't figure out the controls. I tried making blank sprites that scrolled with the view of the player (one on the bottom, one on top) for movement (up and down), and then making a sprite that acted as a "fire" button. I then used "System - Every tick + Touch - Is touching (Sprite) > Player - Move 5 pixels at angle 90", which is what I had for the keyboard, but replacing the arrow key with "Touch - Is touching (Sprite)". I also did basically the same thing for the "fire" button sprite; but none of the "button-sprites" worked on my mobile device. I then thought that maybe conventional Button objects might work, but when going to place the condition for it, I realized that there was no "Is holding down" on the button...

If anyone has any ideas please share them with me, as I accept that my event "coding" may have been off, or that i just haven't thought of everything. I'm sure this is a common problem, so someone should probably see this and have a simple solution.

Thanks -

DKinGer

You can always use this workaround:

- (Condition) Is touching object [Button][/code:2p05s6u7]
If you are using the mouse, you can use this:
[code:2p05s6u7]- (Condition) Mouse is over object [Button]
[ul]
	[li](Condition) Left mouse button is down[/code:2p05s6u7][/li]
[/ul]
Also, a little side note: