Null job light patterns?

The RT11 pattern I rememebr was something like (I may have got the direction wrong) 1111111111111111 0111111111111111 0011111111111111 0111111111111110 1111111111111100 1111111111111000 0111111111111100 0011111111111110 0001111111111111 0000111111111111 And so on, with the colum of lit bulbs getting shorter by one every time it hit an end, until there was just one lamp on, When that got to the appropriate end, the pattern restarted with all 16 lamps on. This only worked on processors with a lamp register (like the 11/45 and 11/70). It was farily easiy to find the appropriate address in the source code, change it to point to a 'spare' parallel' port (DR11K or something), and then connect that to flashing lights. Made a _really_ expensive Newtonsday decoration... -tony