From a IR/switch led light, i am trying to use 2 lights with one switch.

It currently turns light A on or off,
but i want it to switch between light A(original) and light B(added)

RED/GREEN one light always on, switch on press

 

You are going to have to explain that better.

It currently turns light A on or off,
but i want it to switch between light A(original) and light B(added)

Switch between A & B implies only one LED is illuminated at any one time. Then you follow up with:

RED/GREEN one light always on, switch on press

Now what do you want? Switch on press as in a push button switch? I have no idea what you want? If you want to alternate between A & B then you need a SPDT switch.

Ron

 

What the TS did not mention is the actual voltage and power being switched, or the available voltage, if it is conveniently available. So all answers are guesses. For minimum parts it can be done with one SPDT switch and one resistor, plus the 2 LEDs.