I only code jass, so it won't be a much help, I guess. But it's easy. You can do this on your own. Just increment the counter on every damage event and decrease it again by 1 every 0.2 seconds through a periodic timer.
Then, in the damage event response, just check what the counter variable is and offset the texts.
counter == 0 --> x, y remain unchanged
counter == 1 --> set x = x-100
counter == 2 --> set x = x+100
counter == 3 --> set y = y-100
counter >= 4 --> set y = y+100
If you want it more sophisticated, you can have a counter on each unit individually by using a unit indexer, as you usually want the displacement individually for every unit.