You're going to need -
Quite a long ethernet cable (3m)
80x LEDS REDYELLOWGREEN asorted
2x USB cables
2x USB wall socket dings
1x Semi-Active brain
First off cut the jacks off both ends of the ethernet cable
Cut the ethernet cable in half through the middle
Get you scissors and rip the plastic/rubber that the wires are surrounded by...(usually the grey stuff.)
Untwist all the wires (May take about an hour lol)
Save 4 of the wires
Cut the rest of the wires into about 3" (No need to measure though - just guess) strips ( I managed to make 127 lol)
Get your maplin cheap cra^^y leds 80 assorted bla bla and moan about how strange yoor set will look..
Get the leds and individually twist and eleccy tape tape them to the end of the 3" strips (you need some of the wire showing btw) Do 2 sets of 39 leds and make sure it loops at the end and then attach the first led to one of the long wires etc and the same with the other part where it loops.
After about an hour you will hopefully have finished. (hopefully).
At the end of the wire on both sets split your usb cable in half and wire the power part of it (redorblack or redorwhite I think).
make sure all bits of it look safe..
Then attach them to your beams in the long string and plug em in to your usb socket and be amazed.. (hopefully! lol)
Thankyou for reading the most badly written guide in history..