instructions:
up arrow - moves left column upwards
down arrow - moves right column downwards
left arrow - changes colour of left light
right arrow - changes colour of right light

change colours of right column to
yellow push up arrow
red push up arrow
green up again
red and again
red and again
yellow

change colours of right column to
red press down
green press
yellow press
red press
yellow press
red and press once more

voila...

I couldn't understand it... =o

I know what colour the lights need to be. The problem is that it is impossible to get the lights to the correct colours. I manage to get three and then clicking any button wipes them out. I can't get all the lights on the right to turn green at the same time.

Here is how the logic worked in my mind.

Use a pen and paper:

Start making changes. UP moves only the left COLUMN. Down moves only the right COLUMN. Left changes the BOTTOM left color. Right changes the BOTTOM right color (you are only changing colors on the bottom one when you using left/right).

So start with the bottom and change its colors until the light turns green. write that down. Then use the up/down arrows to move the columns and change colors on the next one. As you start seeing combinations turn green, write down the color and note which row it is. Once you have written down all the rows, make changes to one column at a time. My little brain couldn't handle trying to keep both columns accurate in any other order.

So work you way down the left side following your notes. Its pretty easy. Just match the color then press up. Match the color then press up. Repeat for the right side only press down after matching the color.

(sounds like the OP followed the same strat, but I wanted to expound in case the puzzle was different. I know I found a video walkthrough and his solution did NOT match mine, so you may have to work this out on your own).

I finally managed to do it and I got to the point where I didn't have to change the left colours at all, just the right colours (and by right I don't mean the right column, I mean the right part of the left column). I had to reverse the way I did it so I was working from down -> up instead of up -> down. I don't know if that makes sense, but this was an annoying little puzzle.

I actually quite enjoyed it (yay - pen and paper, well, tablet actually :) ), to each his own I guess

If you dont see the green lights and only yellow, you might have your brightness set too bright.
This puzzle may look like it drives you crazy until you figure out how to do it.

And hucklebarry if you and me are talking about the same walkthrough video, he skipped this puzzle.

I made something in paint, maybe that will help someone out.

Yeah, there may be an issue with the brightness causing the Yellow and Green colors to merge (which will make it very frustrating), this may be addressed in a future patch.
Good diagram lugum, that is exactly what I drew to help me solve it :)

(Hmmmm... are you the same lugum who was an OP in some old Efnet IRC channel related to old games?)

#abandonware yes, and i believe oldgames too, not for long though till others took over.
Now it's abandoned, i hop in like once every 2 years or something now.