Touch-based lock protection..where is it?

[xenoetry]

As the thread title asks, are their any out there? Im looking for a s2u type program, but instead of sliding, you use screen taps to unlock. For instance, it gives you four points to touch, top, bottom left, right, and you set a 4-press code to unlock it. Something such as right, right, bottom, right.

Anything such as this or another form of lock would be great...is there something out there?