I tried it and everything worked, but I must say it isn't like the real code in the Matrix. With this, you have the code streaming down like in the movie, but each particle is constantly changing because of the random command in the mel which does not occur. I looked closely at the coding in the Matrix in a specific scene (when Neo is talking to Cypher and Cypher offers him a drink. right after Cypher says "sweet dreams") to see exactly what it looked like and all I can say is that I don't know how one would go about making it. It's movement is complex. If you look closely, you can see that the code doesn't really move from top to bottom but rather "lights up" from top to bottom. I don't think you ever actually see a letter or number in the code move. Another thing is that the first character in each line of moving code is white. It almost seems like when they created this effect they had a plane of some sort with lots of numbers and letters and ran moving lights inbehind it to light the characters up.

Here's another fact: The Matrix code you see in the Neo and Cypher scene is different from the code you see in the beginning of the movie. This other coding is all numbers. (I suppose because it has to do with the phone system since the machines are tracing Trinity's line at this time) This code is easier to do since each number is constantly changing and nothing moves up or down. In Maya terms, it's like having a bunch of spread out, instanced particles standing still with a rand. expression to control the instances.

Anyway, I think this has turned into my next project. I'm going to try and make a realistic Matrix code.