qmk_firmware_custom/keyboards/ckeys/obelus/info.json

{
  "keyboard_name": "Obelus",
  "url": "",
  "maintainer": "qmk",
  "width": 4,
  "height": 4,
  "layouts": {
    "LAYOUT_ortho_4x4": {
      "key_count": 16,
      "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}, {"x":0, "y":3}, {"x":1, "y":3}, {"x":2, "y":3}, {"x":3, "y":3}]
    }
  }
}