Yeah, no worries, it's called the Pyramid puzzle or something like that (it's an actual puzzle that gets used a lot in cognitive testing, etc.). I can't remember the labels they used, so we'll call them X, Y, Z (from left to right). What you have to do is thus:
Move the top piece from X to Y
Move the second top piece from X to Z
Move the top piece from Y to Z
Move the third top piece from X to Y
Move the top piece from Z to X
Move the second top piece from Z to Y
Move the top piece from X to Y
... You should now have the bottom piece still on X and the rest of the pyramid on Y ...
Move the bottom piece from X to Z
Move the top piece from Y to Z
Move the second top piece from Y to X
Move the top piece from Z to X
Move the third top piece from Y to Z
Move the top piece from X to Y
Move the second top piece from X to Z
Move the top piece from Y to Z
... And that should solve your puzzle.