|  | @@ -774,10 +774,13 @@ let gameFrame = function () {
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				|  |  |    return { x, y, width, height, rect, point };
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				|  |  |  };
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				|  |  |  
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				|  |  | -// for debug
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				|  |  | +// For debug
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				|  |  |  const debugGrid = function () {
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				|  |  | -  for (let i = 0; i < 12; i++) {
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				|  |  | -    game.add.geom.rect(i * 160, 0, 80, 1080, colors.white, 0, colors.blue, 0.3);
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				|  |  | -    game.add.geom.rect(0, i * 180, 1920, 90, colors.white, 0, colors.blue, 0.3);
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				|  |  | +  const grid = 12;
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				|  |  | +  const h = 1920 / (grid + 0.5);
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				|  |  | +  const v = 1080 / (grid + 0.5);
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				|  |  | +  for (let i = 0; i < grid; i++) {
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				|  |  | +    game.add.geom.rect(h / 2 + i * h, 0, h / 2, 1080, '', 0, colors.blue, 0.3);
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				|  |  | +    game.add.geom.rect(0, v / 2 + i * v, 1920, v / 2, '', 0, colors.blue, 0.3);
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				|  |  |    }
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				|  |  |  };
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