Strip Mine 2

term.write("Tunnel Length: ")
tunnelLength = read()
term.write("# of tunnels: ")
tunnels = read()

function mine()
    local a,v=turtle.inspectUp()
    if v.name ~= "minecraft:stone" then
        turtle.digUp()
    end
    a,v=turtle.inspectDown()
    if v.name ~= "minecraft:stone" then
        turtle.digDown()
    end
    a,v = turtle.inspect()
    if v.name ~= "minecraft:stone" then
        turtle.dig()
    end
    turtle.turnRight()
    a,v = turtle.inspect()
    if v.name ~= "minecraft:stone" then
        turtle.dig()
    end
    turtle.turnRight()
    a,v = turtle.inspect()
    if v.name ~= "minecraft:stone" then
        turtle.dig()
    end
    turtle.turnRight()
    a,v = turtle.inspect()
    if v.name ~= "minecraft:stone" then
        turtle.dig()
    end
    turtle.turnRight()
end

function dig()
    while turtle.detect() do
        turtle.dig()
        os.sleep(0.5)
    end
    turtle.forward()
    mine()
    while turtle.detectUp() do
        turtle.digUp()
        os.sleep(0.5)
    end
    turtle.up()
    mine()
    turtle.down()
    if turtle.detectDown() then
        turtle.digDown()
    end
    turtle.down()
    mine()
    turtle.up()
end

function unload()
    for i=1,16 do
        turtle.select(i)
        turtle.drop()
    end
end

for i = 1, tunnels do
    for j = 1, tunnelLength do
        dig()
    end

    turtle.turnRight()
    turtle.turnRight()

    for k = 1, tunnelLength do
        turtle.forward()
    end

    turtle.turnRight()

    local distance = 3*(i-1)

    for l=1, distance do
        turtle.forward()
    end
    unload()
    turtle.turnRight()
    turtle.turnRight()

    for m=1, distance do
        turtle.forward()
    end

    for n=1, 3 do
        while turtle.detect() do
            turtle.dig()
            os.sleep(0.5)
        end
        turtle.forward()
        turtle.digUp()
        turtle.digDown()
    end
    turtle.turnLeft()
end

turtle.turnLeft()
for i=1,3*tunnels do
    turtle.forward()
end
unload()
print("DONE!!! WOOOOOO!")