id int primary key, assetId int, x int, y int, w int, h int, name varchar(16), FOREIGN KEY(assetId) REFERENCES assets(id)
 0,  0,     0,  0, 32, 32,   'red'
 1,  0,    32,  0, 32, 32,   'red'
 2,  0,    64,  0, 32, 32,   'red'
 3,  0,    96,  0, 32, 32,   'red'
 4,  0,     0, 32, 32, 32,   'red'
 5,  0,    32, 32, 32, 32,   'red'
 6,  0,    64, 32, 32, 32,   'red'
 7,  0,    96, 32, 32, 32,   'red'