Help with directions

So, i'm trying to make a thing that sets a specific angle and spawns at a random distance away, slowly moving towards you until you look at it. I'm making it a particle that moves based on variables that are set when the thing starts attacking with a condition I already made. The problem is that Mcreator doesnt let me make a vector variable (not like id figure out how to work with one anyway) and I cant find any other way for it to set a line (only X and Z) for the particle to move on. Please, respond with a block coding solution, because I'm too dumb to actually code.