Lua Tekkit Turtle

local tArgs = {...}
getOrientation()

-- Gets the turtle's orientation.
function getOrientation()
    if turtle.getFuelLevel() < 2 then
        print("Not enough fuel for determining the orientation. Needs at least two.")
        return
    end

    local tries = 1
    while turtle.detect() do
        if tries =< 4 then
            print("Obstructed, turning.")
            tries = tries + 1
            turtle.turnRight()
        else
            print("Turtle obstructed, orientation cannot be determined.")
            return;
        end
    end

    local pos1 = vector.new(gps.locate(5))
    turtle.forward()
    local pos2 = vector.new(gps.locate(5))
    turtle.back()

    local deltaZ = pos2.z - pos1.z
    local deltaX = pos2.x - pos1.x

    local orientation = nil
    if deltaZ == 0 then
        if deltaX == 1 then
            orientation = "east"
        else
            orientation = "west"
        end
    else
        if deltaZ == 1 then
            orientation = "south"
        else
            orientation = "north"
        end
    end

    print("Looking " .. orientation)
end

-- Moves turtle forwards until the path is obstructed.
function moveForward()
    while not turtle.detect() do
        if turtle.getFuelLevel() > 0 then
            turtle.forward()
        else
            print("Not enough fuel to continue, aborting...")
            break
        end
    end
end

-- Moves turtle one block forwards
function moveOneForward()
    if turtle.getFuelLevel() > 0 then
        -- turtle.forward() returns true or false depending on whether the turtle did actually move or not
        if not turtle.forward() then
            print("Path is obstructed!")
        end
    else
        print("Not enough fuel for moving forward!")
    end
end

function moveLeft()
    turtle.turnLeft()
    moveForward()
end

function moveOneLeft()
    turtle.turnLeft()
    moveOneForward()
end

function moveRight()
    turtle.turnRight()
    moveForward()
end

function moveOneRight()
    turtle.turnRight()
    moveOneForward()
end