qmk_firmware/keyboards/rocketboard_16/info.json

{
    "keyboard_name": "Rocketboard-16",
    "url": "",
    "maintainer": "fl3tching101",
    "width": 4,
    "height": 5,
    "layouts": {
        "LAYOUT": {
            "layout": [
                {"x": 0, "y": 0},
                {"x": 3, "y": 0},

                {"x": 0, "y": 1},
                {"x": 1, "y": 1},
                {"x": 2, "y": 1},
                {"x": 3, "y": 1},

                {"x": 0, "y": 2},
                {"x": 1, "y": 2},
                {"x": 2, "y": 2},
                {"x": 3, "y": 2},

                {"x": 0, "y": 3},
                {"x": 1, "y": 3},
                {"x": 2, "y": 3},
                {"x": 3, "y": 3},

                {"x": 0, "y": 4},
                {"x": 1, "y": 4},
                {"x": 2, "y": 4},
                {"x": 3, "y": 4}
            ]
        }
    }
}