I think what he means is this:-
1. You have your mesh, with four triangles:
------
|\1 /|
|4\/2|
| /\ |
|/3 \|
------
2. You have a 'stripey' texture, applied to each triangle with all the UV coordinates pointing outwards, so that it looks like the squares in your video.
3. In your script you position the model in the background position, filling the whole screen.
4. In the entities' action, you do something like this:
while(1)
{
my.u += 10*time_step; // scrolls the texture, change the 'u' with 'v' if it doesn't work.
wait(1);
}
