Four Harvards, some orchestrated moves.
First up, erm, down, a vertical dive followed by a half Cuban

crossing back over:

(you'll notice this is a diagram not the actual aircraft...)
First problem is, the pilots are absolutely useless, they don't even get to the bottom of the dive together
One or other gets frightened early and pulls up 500 ft AGL instead of daisycutting as he's supposed to.
Best we've achieved is a 3+1 or a 2+2 (which looks more like you meant it)
So I thought I'd post some stills instead, to show off the nice aeroplanes.
Movie to follow, sometime.

