DAO6H35AWHIN7CU6O2MYC22CQCR4QEBYYJ2G6S3PMZY7ZWYOUVNAC
depth = self.depth + 1
tl = Quad(self.model, (l, t, lr, tb), depth)
tr = Quad(self.model, (lr, t, r, tb), depth)
bl = Quad(self.model, (l, tb, lr, b), depth)
br = Quad(self.model, (lr, tb, r, b), depth)
tl = Quad(self.model, (l, t, lr, tb))
tr = Quad(self.model, (lr, t, r, tb))
bl = Quad(self.model, (l, tb, lr, b))
br = Quad(self.model, (lr, tb, r, b))