{
  "params": {
    "cab": {
      "type": "choice",
      "options": [
        "white",
        "red",
        "blue",
        "yellow",
        "green"
      ],
      "default": "white",
      "label": "Cab",
      "describe": "Cab colour: white, red, blue, yellow or green."
    },
    "drum": {
      "type": "choice",
      "options": [
        "orange stripe",
        "blue stripe",
        "red stripe",
        "yellow and black",
        "plain grey"
      ],
      "default": "orange stripe",
      "label": "Drum",
      "describe": "Drum colours: white with an orange, blue or red spiral stripe, yellow with a black stripe, or plain grey. The stripe makes the turning drum easy to read."
    },
    "axles": {
      "type": "choice",
      "options": [
        "3",
        "4"
      ],
      "default": "3",
      "label": "Axles",
      "describe": "3 (8 m, one steer axle and a rear tandem) or 4 (9 m, twin steer axles for bigger loads)."
    },
    "chute": {
      "type": "range",
      "min": -90,
      "max": 90,
      "step": 5,
      "default": 0,
      "label": "Chute",
      "describe": "Discharge chute angle in degrees at the rear: 0 folded straight back, 90 swung to the left side, -90 to the right side."
    }
  },
  "presets": {
    "ready mix": {
      "cab": "white",
      "drum": "orange stripe"
    },
    "pouring on site": {
      "cab": "red",
      "drum": "red stripe",
      "chute": 60
    },
    "four-axle heavy": {
      "axles": "4",
      "cab": "yellow",
      "drum": "yellow and black"
    }
  },
  "night": {
    "headlight": {
      "zone": "headlight",
      "color": "#fff4c8",
      "intensity": 1.2,
      "describe": "Headlights glow."
    },
    "taillight": {
      "zone": "taillight",
      "color": "#ff2a2a",
      "intensity": 1,
      "describe": "Tail lights glow red."
    },
    "beacon": {
      "zone": "beacon",
      "color": "#ffad2e",
      "intensity": 1.8,
      "describe": "The amber beacon on the cab roof glows."
    }
  }
}