Weird Planes

{
    "camera": {
        "center": {
            "x": 0,
            "y": 0,
            "z": 0
        },
        "focus": 10,
        "normal": {
            "x": 0,
            "y": 0,
            "z": 1
        },
        "resolution": [
            0.01,
            0.01
        ],
        "size": [
            1024,
            1024
        ]
    },
    "lights": [
        {
            "intensity": 1,
            "location": {
                "x": 5,
                "y": -10,
                "z": 0
            }
        },
        {
            "intensity": 1,
            "location": {
                "x": -5,
                "y": -10,
                "z": 0
            }
        },
        {
            "intensity": 1,
            "location": {
                "x": 0,
                "y": -10,
                "z": 0
            }
        }
    ],
    "objects": [
        {
            "center": {
                "x": 0,
                "y": 0,
                "z": 5
            },
            "color": {
                "b": 0,
                "g": 0,
                "r": 255
            },
            "lambert": 1,
            "radius": 1,
            "type": "sphere"
        },
        {
            "center": {
                "x": 0,
                "y": -2,
                "z": 10
            },
            "color": {
                "b": 0,
                "g": 255,
                "r": 0
            },
            "lambert": 1,
            "radius": 0.5,
            "type": "sphere"
        },
        {
            "center": {
                "x": 0,
                "y": 2,
                "z": 2
            },
            "color": {
                "b": 255,
                "g": 0,
                "r": 0
            },
            "lambert": 1,
            "radius": 0.5,
            "type": "sphere"
        },
        {
            "center": {
                "x": 0,
                "y": 5,
                "z": 0
            },
            "color": {
                "b": 255,
                "g": 255,
                "r": 255
            },
            "lambert": 1,
            "normal": {
                "x": 0,
                "y": -1,
                "z": 0
            },
            "type": "plane"
        },
        {
            "center": {
                "x": 0,
                "y": -10,
                "z": 20
            },
            "color": {
                "b": 128,
                "g": 128,
                "r": 0
            },
            "lambert": 1,
            "normal": {
                "x": 0,
                "y": 0,
                "z": -1
            },
            "type": "plane"
        }
    ]
}