Quarry

function diga()
    turtle.dig()
    turtle.digUp()
    turtle.digDown()
end

io.write('What length and width would you like your quarry to be?\n')
local stepsLI = io.read()
local stepsL = stepsLI
local stepsWI = io.read()
local stepsW = stepsWI

local toTurn = stepsL - 1

io.write('How many levels would you like to go?\n')
local levelI = io.read() / 3
local level = math.floor(levelI)

local count = 0

for f = 1, level, 1 do
    for g = 1, 2, 1 do
        turtle.digDown()
        turtle.down()
    end

    for h = 1, stepsL, 1 do
        for i = 1, stepsW - 1, 1 do
            while(turtle.detect() or turtle.detectUp() or turtle.detectDown()) do
                diga()
            end
            turtle.forward()
        end
        count = count + 1
        if(toTurn ~= 0) then
            if(count % 2 == 0) then
                turtle.turnLeft()
                if(turtle.detect() or turtle.detectUp() or turtle.detectDown()) then
                    diga()
                end
                turtle.forward()
                turtle.turnLeft()
            else
                turtle.turnRight()
                if(turtle.detect() or turtle.detectUp() or turtle.detectDown()) then
                    diga()
                end
                turtle.forward()
                turtle.turnRight()
            end
            toTurn = toTurn - 1
            io.write(toTurn)
        end
    end
    turtle.digUp()
    if(count % 2 == 0) then
        turtle.turnRight()
    else
        turtle.turnLeft()
    end
    turtle.digDown()
    turtle.down()
    stepsL = stepsLI
    stepsW = stepsWI
    toTurn = stepsL - 1
end