qmk_firmware/keyboards/mechlovin/delphine/mono_led/keyboard.json

{
    "usb": {
        "pid": "0xDEF1",
        "device_version": "0.0.1"
    },
    "features": {
        "bootmagic": true,
        "mousekey": true,
        "extrakey": true,
        "nkro": true,
        "backlight": true,
        "rgblight": true
    },
    "rgblight": {
        "saturation_steps": 8,
        "brightness_steps": 8,
        "led_count": 13,
        "sleep": true,
        "animations": {
            "breathing": true,
            "rainbow_mood": true,
            "rainbow_swirl": true,
            "snake": true,
            "knight": true,
            "christmas": true,
            "static_gradient": true,
            "rgb_test": true,
            "alternating": true,
            "twinkle": true
        }
    },
    "ws2812": {
        "pin": "E2"
    },
    "backlight": {
        "pin": "B6"
    }
}