That should do the trick: I think to remember that the positioning changed a bit: in case you can try to change the coords in ci_init (if I correctly recall the coords for ore_decine, ore_unita, minuti_decine and minuti_unita... ore=hours and minuti=minuts...)

You want probably change the 'fondo.png' too to make the background match the nixie style: I should still have some original XARA vector files if you are brave enough to try to learn a new (great) graphic program