return {
    {
        id = 1,
        type = "whole",
        depth = "foreground"
    },
    {
        id = 2,
        type = "emtpy",
        depth = "foreground"
    },
    {
        id = 5,
        type = "emtpy",
        depth = "background"
    },
    {
        id = 6,
        type = "emtpy",
        depth = "background"
    },
    {
        id = 7,
        type = "emtpy",
        depth = "background"
    },
    {
        id = 13,
        type = "whole",
        depth = "foreground"
    },
    {
        id = 25,
        overlay = {17,19,21,23},
        type = "emtpy",
        depth = "background"
    },
    {
        id = 26,
        overlay = {18,20,22,24},
        type = "emtpy",
        depth = "background"
    },
    {
        id = 37,
        overlay = {29,31,33,35,42,44,46,48},
        type = "emtpy",
        depth = "background"
    },
    {
        id = 38,
        overlay = {30,32,34,36,41,43,45,47},
        type = "emtpy",
        depth = "background"
    },
    {
        id = 49,
        overlay = {53,55,57,59},
        type = "emtpy",
        depth = "background"
    },
    {
        id = 50,
        overlay = {54,56,58,60},
        type = "emtpy",
        depth = "background"
    },
    {
        id = 61,
        overlay = {1},
        type = "emtpy",
        depth = "background"
    },
    {
        id = 62,
        overlay = {1},
        type = "emtpy",
        depth = "background"
    }
}