qmk_firmware/keyboards/kb_elmo/twelvekey/info.json

{
    "keyboard_name": "twelvekey", 
    "url": "https://github.com/kb-elmo/twelvekey", 
    "maintainer": "kb-elmo", 
    "width": 4, 
    "height": 3, 
    "layouts": {
        "LAYOUT_ortho_3x4": {
            "layout": [{"x":0, "y":0},
                {"x":1, "y":0},
                {"x":2, "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}
            ]
        }
    }
}