Multiply vectors to move points

God Night !!...

Recently I entered the world of GH, I have learned many things, but others still do not know how to do, like this, that although I did develop, the erased by mistake and I have not get to do it.

I have a point A which moves in a range of -10,0 or 10,0 (x axis).
I have another point B to be moved in the Y axis and, starting at coordinates 0,0.

I need the point A moves from -10,0 to 10,0, and at the same time, the point B moves in the Y axis, as simulating repel between these.

I know this can be done with multiplication between vectors, but do not know what isthe right way. The attached image is as I am doing at this time.

I thank who can help me or tell me to do.
Thank you very much.