Quarry v2.4

--[[
Version 2.4
Written by: Tom Nordloh (Notze)

This script will dig a box with the
length you wish!
Place the following things into the
Turtles inventory:
Slot 1: cole
]]

-- make your adjustments here
local int x = 5 -- from Turtle's direction right
local int y = 5 -- height, like Minecraft (F3) y
local int z = 5 -- in Turtle's looking direction
-- end of adjustments

function main()
    local futherDown = false
    for i=1, y, 1 do
        refuel( 1 + ((x*z)/96) + ((x+y)/96) )
        down(1)
        local boolean nextEndUp = true
        forward(z-1)
        for j=2, x, 1 do

            if nextEndUp then
                turnRight()
                forward(1)
                turnRight()
                forward(z-1, futherDown)
                nextEndUp = false
            else
                turnLeft()
                forward(1)
                turnLeft()
                forward(z-1, futherDown)
                nextEndUp = true
            end

        end

        if nextEndUp then
            turnAround()
        else
            turnRight()
            forward(x-1, futherDown)
            turnRight()
        end
        futherDown = true
    end
    up(y)
end

function refuel(amount)
    if turtle.getFuelLevel() < 96*amount then
        turtle.select(1)
        turtle.refuel(amount)
    end
end

function forward(length, fast)
    for i=1, length, 1 do
        if fast then
            turtle.dig()
            turtle.forward()
        else
            while turtle.detect() do
                turtle.dig()
                --sleep(0.5)
            end
            turtle.forward()
        end
    end
end

function back(length)
    for i=1, length, 1 do
        turtle.back()
    end
end

function turnRight()
    turtle.turnRight()
end

function turnLeft()
    turtle.turnLeft()
end

function turnAround()
    turnRight()
    turnRight()
end

function up(length)
    for i=1, length, 1 do
        while turtle.detectUp() do
            turtle.digUp()
            sleep(0.5)
        end
        turtle.up()
    end
end

function down(length)
    for i=1, length, 1 do
        turtle.digDown()
        turtle.down()
    end
end

main()