If you want to end up with a flexible cord full of lights (like festoon type lighting) you will need lamp holders (not batten fix type holders like the ones in frollard's diagram). Lamp holders are the ones with the conical cap over the terminals and are usually suspended from the ceiling rather than fixed to it. A two core cable as the lamp holders generally don't have an earth terminal, although you should check the regulations in your part of the world. A double pole switch and a plug. Connect the wires to the first lamp. Cut the cable to the length required to reach the second lamp. Join the cable to the rest of your cable and connect to the second lamp. Repeat this procedure until you run out of lamps or cable. Connect the cable to one pair of terminals on the switch. Connect the remaining cable to the pair of terminals on the other side of the switch. Connect the remaining end to the plug. Try and keep the cable polarities the same, but it doesn't really matter for light bulbs. Plug in and enjoy. If you need to buy any of this stuff, a festoon lighting kit would be cheaper to buy and easier to assemble without any electrical knowledge. It comes with coloured bulbs too!