for actor in MovableMan.Actors do
      local avgx = actor.Pos.X - self.Pos.X;
      local avgy = actor.Pos.Y - self.Pos.Y;
      local dist = math.sqrt(avgx ^ 2 + avgy ^ 2);
      if dist < curdist and actor:NotHasObject("Syringe") then -- That's the part of the code I don't know
         curdist = dist;
         self.target = actor;
      end

if not(actor:HasObject("Syringe")) then
    blah blah blah
end