turtle automation - crop sticks

--- turtleplaceitem
--- simple program to automate crop sticks

width = 8
length = 8
lastmoveok = true
for l=1,length,1 do
    for w=1,width,1 do
        turtle.placeDown()
        lastmoveok=turtle.forward()
    end
    -- undo the last forward, if it happened ok
    if lastmoveok == true
        turtle.back()
    end
    -- to save the hastle of going back [w] spaces and shifting over a block
    -- which consumes double the fuel, conserve by interleaving:
    failcount=0
    if ( l % 2 ) == 0 then
        if turtle.turnLeft() then failcount=failcount+1; end
        if turtle.forward() then failcount=failcount+1; end
        if turtle.turnLeft() then failcount=failcount+1; end
    else
        if turtle.turnRight() then failcount=failcount+1; end
        if turtle.forward() then failcount=failcount+1; end
        if turtle.turnRight() then failcount=failcount+1; end
    end
    -- if any of the above failed, we need to stop, the turtle is either
    -- obstructed or out of fuel
    if failcount > 0 then
        -- do not check zero fuel level in case cheat or other alternative is active
        -- let turtle run if it CAN run (not reposnsible for players that take advantage)
        if turtle.getFuelLevel() == 0 then
            -- strictly for info purposes only
            print("out of fuel, aborting")
        else
            print("turtle obstructed, aborting")
        end
        break
    else
        print("this run is aok, starting next run, if any")
    end
    -- ready for next run
end
print("completed run exiting program")
print("remaining fuel: " .. turtle.getFuelLevel() );