locust: simple task help (or at least i think)

hopefully the pic is relevant enough..

i just want the boids to seek a certain point and avoid others. tried it and can't get the parameters right (it seems that once the trajectory is changed by one of the deflectors, they stop seeking the goal...)

may it's a bit too much to ask, but it would help me quite a bit if anyone has the time to make a working example of this (simple?) task

thanks for looking, have a nice one!