--Program for a Quarry

--Clearing Console

function clearConsole()
    term.clear()
    term.setCursorPos(1, 1)
end

--Refueling

function checkFuel()
    local fuelLevel = turtle.getFuelLevel()
    if fuelLevel == "unlimited" or fuelLevel > 10 then
        return
    end

    clearConsole()
    print("Low on fuel - Refueling")

    --Refuel from Inventory

    for slot = 1, 16 do
        turtle.select(slot)
        if turtle.getFuelLimit() then
            break
        end
    end

    turtle.select(1) --Select default slot
end

--Quarry Area

function quarry(length, width)
    for i = 1, length do
        for j = 1, width do
            checkFuel() --Check before movement
            turtle.dig()
            turtle.forward()
        end

        if i < length then
            if i % 2 == 1 then
                turtle.turnRight()
                checkFuel()
                turtle.dig()
                turtle.forward()
                turtle.turnRight()
            else
                turtle.turnLeft()
                checkFuel()
                turtle.dig()
                turtle.forward()
                turnLeft()
            end
        end
    end
end

--Inventory emptying

function ClearInventory()
    clearConsole()
    checkFuel()
    turtle.turnLeft()
    turtle.turnLeft() --Rotating to Place Chest

    turtle.select(2)
    turtle.place()
         for slot = 3, 16 do
            turtle.select(slot)
            turtle.drop()
         end
    turtle.select(1)
    turtle.turnRight()
    turtle.turnRight()
end

--Interface

clearConsole()
print("Mining Program")
print("--------------")
clearConsole()

--Width, Length

write("Width ?: ")
local width = tonumber(read())

write("Length ?: ")
local lenght = tonumber(read())

--Quarry Area

quarry(lenght, width)

print("Completed Task")