qmk_firmware/keyboards/handwired/numpad20/info.json

{
  "keyboard_name": "numpad20 handwired",
  "url": "",
  "maintainer": "qmk",
  "layouts": {
    "LAYOUT": {
      "layout": [
        {"label":"K00", "x":0, "y":0},
        {"label":"K01", "x":1, "y":0},
        {"label":"K02", "x":2, "y":0},
        {"label":"K03", "x":3, "y":0},
        {"label":"K10", "x":0, "y":1},
        {"label":"K11", "x":1, "y":1},
        {"label":"K12", "x":2, "y":1},
        {"label":"K13", "x":3, "y":1},
        {"label":"K20", "x":0, "y":2},
        {"label":"K21", "x":1, "y":2},
        {"label":"K22", "x":2, "y":2},
        {"label":"K23", "x":3, "y":2},
        {"label":"K30", "x":0, "y":3},
        {"label":"K31", "x":1, "y":3},
        {"label":"K32", "x":2, "y":3},
        {"label":"K33", "x":3, "y":3},
        {"label":"K40", "x":0, "y":4},
        {"label":"K41", "x":1, "y":4},
        {"label":"K42", "x":2, "y":4},
        {"label":"K43", "x":3, "y":4}
      ]
    }
  }
}