{"type": "sprite", "name": "bg_blue", "size": [1, 1], "palette": {"b": "#0066CC"}, "grid": ["b"]}
{"type": "sprite", "name": "bg_gray", "size": [1, 1], "palette": {"g": "#808080"}, "grid": ["g"]}
{"type": "sprite", "name": "checker_tile", "size": [2, 2], "palette": {"w": "#FFFFFF", "k": "#000000"}, "grid": ["wk", "kw"]}
{"type": "sprite", "name": "star", "size": [3, 3], "palette": {".": "#00000000", "y": "#FFFF00"}, "grid": [".y.", "yyy", ".y."]}
{"type": "composition", "name": "solid_fill", "size": [4, 4], "cell_size": [1, 1], "sprites": {"B": "bg_blue"}, "layers": [{"map": ["BBBB", "BBBB", "BBBB", "BBBB"]}]}
{"type": "composition", "name": "pattern_fill", "size": [4, 4], "cell_size": [2, 2], "sprites": {"C": "checker_tile"}, "layers": [{"map": ["CC", "CC"]}]}
{"type": "composition", "name": "fill_with_overlay", "size": [6, 6], "cell_size": [1, 1], "sprites": {"G": "bg_gray", ".": null, "S": "star"}, "layers": [{"map": ["GGGGGG", "GGGGGG", "GGGGGG", "GGGGGG", "GGGGGG", "GGGGGG"]}, {"map": [".S.", "...", ".S."]}]}