def do(actor, targets)
    actor.color.red += (@color.red - actor.color.red) * delta
    actor.color.green += (@color.green - actor.color.green) * delta
    actor.color.blue += (@color.blue - actor.color.blue) * delta
  end
def do(actor, targets)
    actor.color.red += (@color.red - actor.color.red) * delta
    actor.color.green += (@color.green - actor.color.green) * delta
    actor.color.blue += (@color.blue - actor.color.blue) * delta
  end
Blend the actor's color with the assigned color.