Small example "freewheeling" app that can be modified without restarting
{
    "on.initialize": {
        "x": 10,
        "y": 261,
        "w": 600,
        "h": 312
    },
    "on.draw": {
        "x": 626,
        "y": 516,
        "w": 600,
        "h": 494
    },
    "on.update": {
        "x": 630,
        "y": -2,
        "w": 600,
        "h": 468
    },
    "Stars": {
        "x": 3.1571428571429,
        "y": 92.171428571429,
        "w": 600,
        "h": 26
    },
    "Angle": {
        "x": 2,
        "y": 181,
        "w": 600,
        "h": 26
    },
    "draw_debug": {
        "x": 9,
        "y": 614,
        "w": 600,
        "h": 182
    }
}