prototyping of ukulele arduino and merapi started

I Just started to prototype the ledUkulele.

I got myself a max7221 IC and hooked it up to the arduino board.
I’m now thinking of good way to wire the 4*16 matrix
basically a 8×8 matrix but the physical postion of the odd rows is behind the even rows.
Designing this matrix on a breadboard sucks (too many wires), so I need to come up with a better way without soldering.  (suggestions welcome)