size = 10

function tablelength(T)
    local count = 0
    for _ in pairs(T) do count = count + 1 end
    return count
  end


function refuel()
    for i = 1,16 do
    turtle.select(i)
    print(turtle.getFuelLevel())
    if turtle.getFuelLevel() < 200 then
        turtle.refuel(10)
    end
end
end

intebajs = {'minecraft:diamond', 'minecraft:iron_ore', 'minecraft:gold_ore', 'minecraft:emerald', 'minecraft:obsidian', 'minecraft:coal'}

function in_list (tab, val)
    for index, value in ipairs(tab) do
        if value == val then
            return true
        end
    end

    return false
end

function throw_shit()
    for i = 1,16 do
        turtle.select(i)
        sname = turtle.getItemDetail()
        if sname then
            if not in_list(intebajs,sname) then turtle.dropDown() end
        end
    end
end

function find(name)
    local d = {}
    for i = 1,16 do
    turtle.select(i)
    sname = turtle.getItemDetail()
    if sname then
    sname = sname.name
    if name == sname
    then
        d[tablelength(d)+1] = i end
    end
end
    return d
end

function mine()
    turtle.dig()
    turtle.digUp()
    turtle.digDown()
    suc = turtle.forward()
    return suc
end

function walk (len)
    x = 0
    while x < len do
        if mine() then x = x + 1 end
    end
end



for i = 0,size do
    walk(size - i)
    refuel()
    turtle.turnRight()
    throw_shit()
    walk(size - i)
    turtle.turnRight()
    throw_shit()
end