We also decided later to make the trash can more "special" by having it appear to be burning, while deleting Kristie.  This was done because we wanted to emphasize that this process was permanent like a fire burning things to ash and to make the process more cathartic for the person, in this case Cassie, forgetting the other.  To accomplish this, we initially used LED lights and a code for fire burning found online.  However, the lights were too hard to see, so we switched to a neopixel LED strip.