local pos = 0
local fuel = {
    ["minecraft:coal_block"],
    ["minecraft:coal"]
    }
local keep = {
    [fuel] = true,
    ["minecraft:ancient_debris"] = true,
    ["tconstruct:cobalt_ore"] = true,
    ["minecraft:quartz"] = true,
    ["minecraft:cobblestone"] = true,
    ["minecraft:coal_block"] = true
}
local badFluid = "minecraft:lava"
local turtle = turtle -- This line is just becus i use VS code and its is complaning on all lines that containins "turtle" so i make this vriabel you can remove it or keep it do as you whant
local dir = 1
local length = 30

local function refuel()
    for i = 1, 16 do -- for each slot in the chest
        local item = turtle.getItemDetail(i, false)
        if item then -- if there is an item in this slot
            if (string.format("%s", item.name) == fuel) then -- if the item is in the blacklist
                turtle.select(i)
            end
        end
    end
    while(turtle.getFuelLevel() < 160) do
        turtle.refuel(1)
    end
end

local function checkInv()
    for i = 1, 16 do -- for each slot in the chest
        local item = turtle.getItemDetail(i, false)
        if item then -- if there is an item in this slot
            if not keep[string.format("%s", item.name)] then-- if the item is in the blacklist
                turtle.select(i)
                turtle.drop()
            end
        end
    end
end

local function select()
    for i = 1, 16 do -- for each slot in the chest
        local item = turtle.getItemDetail(i, false)
        if item then -- if there is an item in this slot
            if not keep[string.format("%s", item.name)] then -- if the item is NOT in the blacklist
                turtle.select(i)
            end
        end
    end
end

local function lava()
    local isBlock,block = turtle.inspectUp()
    if isBlock then
        if block.name == "minecraft:lava" then
            turtle.up()
            isBlock,block = turtle.inspectUp()
            if isBlock then
                if block.name == "minecraft:lava" then
                    select()
                    turtle.placeUp()
                end
            end
            turtle.down()
        end
    end
    isBlock,block = turtle.inspectDown()
    if isBlock then
        if block.name == "minecraft:lava" then
            turtle.down()
            isBlock,block = turtle.inspectDown()
            if isBlock then
                if block.name == "minecraft:lava" then
                    select()
                    turtle.placeDown()
                end
            end
            turtle.up()
        end
    end
end

local function loop()
    local ready = true

    lava()

    while ready do
        while turtle.detect() do
            turtle.dig()
        end
        while turtle.detectUp() do
            turtle.digUp()
        end
        while turtle.detectDown() do
            turtle.digDown()
        end

        if not turtle.detect() then
            ready = false
        end
    end
    lava()
    turtle.forward()
end

while true do

    if(pos == length) then
        pos = -1
    end

    refuel()

    loop()

    if(pos == -1) then

        if(dir == 1) then
            turtle.turnRight()
            dir = 0
            loop()
            turtle.turnRight()
        else
            turtle.turnLeft()
            dir = 1
            loop()
            turtle.turnLeft()
        end
        checkInv()
    end
    pos = pos +1
end