lave tunnel safe

local tArgs = { ... }

if #tArgs == 0 then
    print("Usage: <blocks> to create tunnel")
    return
end

    --Number of blocks to travel to get the lava
local maxDistance = tArgs[1]

    --local counter for how far the turtle has travle
local traveled = 0

    --A helper function to try and move forward, it will attempt to dig if it is blocked.
local function moveForward()
    if turtle.forward() == false then
            --Failed to move, see if we can dig our way forward
        while turtle.dig() do
            --Keep digging till we can't dig any more, in case gravel is falling.
        end
        if turtle.forward() == false then
            print("I am either blocked or out of fuel.")
            return false
        end
    end
    return true
end

    --A helper function to try and move down, it will attempt to dig if it is blocked.
local function moveDown()
    if turtle.down() == false then
            --Failed to move, see if we can dig our way down
        turtle.digDown()
        if turtle.down() == false then
            print("I am either blocked or out of fuel.")
            return false
        end
    end
    return true
end


    --A helper function to try and move down, it will attempt to dig if it is blocked.
local function moveUp()
    if turtle.up() == false then
            --Failed to move, see if we can dig our way down
        while turtle.digUp() do
            --Keep digging till we can't dig any more, in case gravel is falling.
        end
        if turtle.up() == false then
            print("I am either blocked or out of fuel.")
            return false
        end
    end
    return true
end

    --A helper function to build safe walls around tunnel.

local function walls()
    turtle.select(1)
    turtle.placeDown()
    turtle.turnRight()
    turtle.select(2)
    turtle.place()
    moveUp()
    turtle.select(3)
    turtle.place()
    turtle.turnRight()
    turtle.select(4)
    turtle.placeUp()
    turtle.turnRight()
    turtle.select(5)
    turtle.place()
    moveDown()
    turtle.select(6)
    turtle.place()
    turtle.turnRight()
end

    --Attempt to travel to max distance for getting lava
for i = 1, maxDistance do

    if moveForward() == false then
        print("Could not move forward the full requested distance, starting U-Turn early.")
        break
    end

    traveled = traveled + 1

      --change to placeing blocks
    walls()
end

    --Turn around move a block over and get more lava
    moveForward()
    turtle.select(1)
    turtle.placeUp()
    turtle.turnRight()
    moveForward()
    turtle.turnLeft()
    turtle.turnLeft()
    turtle.place()
    turtle.turnLeft()
    turtle.turnLeft()
    moveForward()
    turtle.turnRight()

    --Travel back the same number of blocks we came
--
    --Travel back the same number of blocks we came
for i = 1, traveled do
    if moveForward() == false then
    end
end

turtle.turnRight()
moveForward()
moveForward()
turtle.turnRight()
turtle.turnRight()
turtle.place()
turtle.turnLeft()
print(turtle.getFuelLevel())