{ "variations": { "default": { "Day": {"source": "InvisibleBlock.png", "rect": [0, 0, 16, 16]}, "Night": {"source": "InvisibleBlock.png", "rect": [16, 0, 16, 16]} }, "Underground": { "source": "InvisibleBlock.png", "rect": [ 16.0, 0.0, 16.0, 16.0 ] }, "Castle": {"link": "Underground"}, "GhostHouse": {"link": "Underground"}, "Volcano": {"link": "Underground"}, "Bonus": {"link": "Underground"}, "Jungle": {"link": "Underground"}, "Space": {"link": "Underground"} } }