CONFIG = {
    "colors": [
        "red", "green", "salmon", "blue",
        "orange", "violet", "goldenrod", "gray"
    ],
    "input": {
        "shape": "o",
        "size": 5,
        "alpha": 1
    },
    "positions": {
        "shape": "-",
        "size": 1,
        "alpha": 0.5
    }
}
