Gustav Klimt used red, black and yellow quite often, which gave these paintings a rather Byzantine look. These colors were used in ancient Greece a lot, because that was what was available to them, and the Byzantine Empire was the eastern half of Greece that remained after it fell. Temporarily at least...
The Parting of Lot and Abraham is about their literal parting - Abraham took his family to Canaan, as God wanted him to, whereas Lot went to Sodom, and defied God's wishes. Now, having this in mind, maybe this mosaic does symbolize B. heaven, as Abraham and his family would go to heaven eventually, because they obeyed God's orders and wishes.
Answer:
Although no instrumental parts are preserved in the notation, a number of instruments are mentioned in the play: Robin plays a silver flageolet, Huars a musette, Boudon and Gautier the tambourin and the comamuse au grand bourdon, and two other have horns.
