Wanting to move a light swich

Can I take the wire that is running to the ceiling light undo it from the ceiling light, wire it to a new light swich throw anew juntion box, then add new wire up to the ceiling light?

I don't think I understand what you are saying. Don't know what you mean by
throw anew juntion box;.

Describe what you have and what you want to do.

Can I take the wire that is going to my ceiling light disconect it run down to a new juntion box, wire it to a new light swich, run another wire back to the ceiling light?