3x3x2 Staircase mine

local function Mine_Stairs()
    -- Ask the Player how often to place a torch
    print("How often should the turtle place a torch? (e.g., every 4 stairs)")
    local torchFrequency = tonumber(io.read()) or 4

    local stepCount = 0

    while true do
        local fuelLevel = turtle.getFuelLevel()

        -- Fuel check
        if fuelLevel == "unlimited" then
            print("Fuel Level: Unlimited")
        elseif fuelLevel < 500 then
            print("Warning: Low Fuel! (" .. fuelLevel .. ")")
        else
            print("Fuel Level: " .. fuelLevel)
        end

        -- Refuel if fuel is low
        if fuelLevel < 500 then
            for i = 1, 15 do
                turtle.select(i)
                if turtle.refuel(0) then
                    turtle.refuel()
                    break
                end
            end
        end

        stepCount = stepCount + 1

        -- Dig the block in front of the turtle and move forward
        turtle.dig()
        turtle.forward()

        -- Dig blocks above and below the turtle
        turtle.digUp()
        turtle.digDown()

        -- Turn right every 2 steps
        if stepCount % 2 == 0 then
            turtle.turnRight()
            stepCount = stepCount - 2  -- Subtract 2 after turning to track the next steps correctly
        end

        -- Place a torch at the specified frequency
        if stepCount % torchFrequency == 0 then
            turtle.select(16)
            turtle.turnLeft()
            turtle.dig()
            turtle.place()
            turtle.turnRight()
            print("Torch placed at stair " .. stepCount)
        end

        -- Stop the loop if an obstacle is detected
        if not turtle.forward() then
            print("Obstacle detected. Stopping.")
            break
        end
    end
end

Mine_Stairs()