Mining turtle fix 2 -MjHasDied1

local args = {...}
local distance = 0

local haveTorches = turtle.getItemCount(15) > 0
local chestCount = turtle.getItemCount(16) > 0


local length = args[1]

function digForward()
    turtle.dig()
    while turtle.forward() == false do
        turtle.dig()
    end
end

function gravelDig()
   while turtle.dig() == true do
        turtle.dig()
   end
end

function placeTorch()
    if distance == 8 or
    if distance == 16 or
    if distance == 24 or
    if distance == 32 or
    if distance == 39
    and haveTorches = true
    then turtle.turnRight
        gravelDig
        turtle.select(15)
        turtle.place
        end
    end
end


function placeChest()
    if distance == 40
    and chestCount = true
    then turtle.turnRight
        gravelDig()
        turtle.select(16)
        turtle.place
        turtle.drop(1,14)
        distance = 0
        end
    end
end

function Tunnel
    for i = 1, tonumber(length) do
    print "Creating Strip Mine"
    while turtle.detect() do
        turtle.dig()
        end
        turtle.forward()
        while turtle.detectUp() do
        turtle.digUp()
        end
        turtle.turnLeft()
        while turtle.detect() do
        turtle.dig()
        end
        turtle.forward()
        while turtle.detectUp() do
        turtle.digUp()
        end
        turtle.turnRight()
        turtle.turnRight()
        turtle.forward()
        while turtle.detect() do
        turtle.dig()
        end
        turtle.forward()
        while turtle.detectUp() do
        turtle.digUp()
        end
        turtle.turnLeft()
        turtle.turnLeft()
        turtle.forward()
        turtle.turnRight()
        end
end