ComfyFactorio/functions/create_tile_chain.lua

local function shuffle(tbl)
    local size = #tbl
    for i = size, 1, -1 do
        local rand = math.random(size)
        tbl[i], tbl[rand] = tbl[rand], tbl[i]
    end
    return tbl
end

local function create_tile_chain(surface, tile, count, straightness)
    if not surface then
        return
    end
    if not tile then
        return
    end
    if not count then
        return
    end

    local position = {x = tile.position.x, y = tile.position.y}

    local modifiers = {
        {x = 0, y = -1},
        {x = -1, y = 0},
        {x = 1, y = 0},
        {x = 0, y = 1},
        {x = -1, y = 1},
        {x = 1, y = -1},
        {x = 1, y = 1},
        {x = -1, y = -1}
    }
    modifiers = shuffle(modifiers)

    for _ = 1, count, 1 do
        local tile_placed = false

        if math.random(0, 100) > straightness then
            modifiers = shuffle(modifiers)
        end
        for b = 1, 4, 1 do
            local pos = {x = position.x + modifiers[b].x, y = position.y + modifiers[b].y}
            if surface.get_tile(pos).name ~= tile.name then
                surface.set_tiles({{name = tile.name, position = pos}}, true)
                position = {x = pos.x, y = pos.y}
                tile_placed = true
                break
            end
        end

        if not tile_placed then
            position = {x = position.x + modifiers[1].x, y = position.y + modifiers[1].y}
        end
    end
end

return create_tile_chain