[
    {
      "prompt": "Quantity and potential of some substance",
      "style": "rounded-square",
      "colour": "white",
      "border": "#fb000d"
    },
    {
      "prompt": "Flow of some substance",
      "style": "rounded-square",
      "colour": "white",
      "border": "#16a541"
    },
    {
      "prompt": "Flow of a substance via a chemical reaction",
      "style": "rounded-square",
      "colour": "white",
      "border": "#091c28"
    },
    {
      "prompt": "Flow of water",
      "style": "line",
      "colour": "#337abc"
    },
    {
      "prompt": "Flow of sodium ions",
      "style": "line",
      "colour": "#2f6d1a"
    }
]