jit.matrix cell question

i am trying to "turn on and off" one cell at a time in a jitter matrix
(as displayed in the jit window). for example;
1. i want to use the jit.grab to capture the video
2. this visual information will be fed through a [ jit.matrix 4 char 600 600 ]
3. this matrix will be "revealed" in the jit.window one cell at a
time, and then "un-revealed" one at a time.

by revealed i mean that the individual square cells would be black
until a message turns them on.

so if only one message had been passed to the jit window, there would be one cell that that displayed the video and 5999 that did not... 2cells on, 5998 off... 3 cells on 5997 off.

the cells that are turned on and off do not have to be sequential, in fact a drunk object would be ideal so that some sort of linear path would be realized.

once all the cells in the jit.matrix are revealed, then each one would turn off again.

i have been working with the "get cell" comment to get specific data (brcosa) from the dumpout-output.