{
  "params": {
    "rackets": {
      "type": "range",
      "min": 1,
      "max": 2,
      "step": 1,
      "default": 2,
      "label": "Rackets",
      "describe": "How many rackets lie on the ground: 1 or 2 (side by side, heads apart)."
    },
    "balls": {
      "type": "range",
      "min": 0,
      "max": 5,
      "step": 1,
      "default": 3,
      "label": "Loose balls",
      "describe": "Number of loose tennis balls scattered around the rackets, 0 to 5."
    },
    "can": {
      "type": "toggle",
      "default": true,
      "label": "Ball can",
      "describe": "A ball can (tube with a coloured lid and label band) standing beside the rackets."
    },
    "extra": {
      "type": "choice",
      "options": [
        "none",
        "ball machine",
        "net post"
      ],
      "default": "none",
      "label": "Extra",
      "describe": "none, ball machine (a wheeled practice ball launcher with a hopper full of balls and a chute pointing +Z) or net post (one court post with its winder and a 1.4 m section of net with the white headband) behind the rackets."
    },
    "colourway": {
      "type": "choice",
      "options": [
        "classic",
        "lime",
        "crimson",
        "ocean"
      ],
      "default": "classic",
      "label": "Colourway",
      "describe": "Racket frame / accent / grip and can colours: classic (off-white frame, navy), lime (black frame, lime), crimson (red frame, black) or ocean (blue frame, cream)."
    }
  },
  "presets": {
    "club bag dump": {
      "rackets": 2,
      "balls": 4,
      "can": true,
      "extra": "none",
      "colourway": "classic"
    },
    "practice session": {
      "rackets": 1,
      "balls": 5,
      "can": false,
      "extra": "ball machine",
      "colourway": "lime"
    },
    "court side": {
      "rackets": 2,
      "balls": 2,
      "extra": "net post",
      "colourway": "crimson"
    }
  },
  "night": null
}