What are the motifs in Valley Song by Athol Fugard?

Consider the cycle of life. Valley Song begins and ends with The Author presenting the audience with a symbol of fertility: a handful of pumpkin seeds. The seeds represent the cycle of life, an idea that is central to the play and its characters. Just as the seeds are planted in the ground, sprout with the sunshine and rain, grow into vines and "Flat White Boer" pumpkins, then return new seeds to the earth, the characters and the society they live in experience birth, growth, death, and renewal.