By Duncan Graham, Borobudur John van der Sterren - Kiwi artist in Indonesia The greens are darker, denser and deeper in his homeland. Tones in his birthplace are brighter, shriller. All are teasing, shifting, mysterious even, difficult to catch on canvas. New Zealand artist John van der Sterren doesn’t shrink from the challenges of Java’s landscapes. “I have the itch,” he says and flexes his fingers. No arthritis, though he’s 78 and spent his early childhood deprived of all e