Trailor Light Wiring?

I want to run magnetic trailor lights temporarily on my 93 yota, so i know i need to splice in a plug to my stock wiring.. the thing is, my stock tails have seperate bulbs for turn then brake/tail.. when the trailor lights have 1 bulb for all 3 functions, the wire on the plug from the lights is 4 wires, white, green, brown and yellow.. anyone know what i need to do?