A system and method are provided for warming a nutritional substance for ingestion by a neonate. The method initially partially decompresses the MPEG compressed video data to obtain block motion vectors and converts the block motion vectors to forward block motion vectors. At least one photo diode on which only outgoing light of each core is incident is present with respect to each of the cores. The user enters the password into the matrix in the form of the pattern, and also enters the username. Typical dyes have anthraquinone, catechol, hydroxyazo or salicylic acid groups or are mordant dyes, such as Carminic Acid, Alizarin Red, Acid Blue 45, Acid Green 41, Hematoxylin, Chromoxane Cyanine R, Calconcarboxylic Acid, Plasmocorinth B, Pyrocatechol, Acid Alizarin Violet N, Alizarin Yellow GG, Mordant Yellow 12 and Mordant Blue 9. The two receiver tubes conduct electricity through the body of the wood burning pen.