Live Texture Stitching Example 1:2

{
    "id": " blocks/concrete_rainbow2",
    "textures": {
        "rainbow": [
            "blocks/red_concrete",
            "blocks/orange_concrete",
            "blocks/yellow_concrete",
            "blocks/green_concrete",
            "blocks/blue_concrete",
            "blocks/purple_concrete",
            "blocks/magenta_concrete"
        ]
    },
    "animation": {
        "interpolate": true,
        "frametime": 4,
        "frames": [
            "#rainbow"
        ]
    }
}