{
    "id": "walk",
    "track": "lower",
    "duration": 0.6,
    "loop": true,
    "keyframes": [
        { "t": 0.0, "leg_l": { "angle": -15 }, "leg_r": { "angle":  15 } },
        { "t": 0.3, "leg_l": { "angle":  15 }, "leg_r": { "angle": -15 } },
        { "t": 0.6, "leg_l": { "angle": -15 }, "leg_r": { "angle":  15 } }
    ]
}