Moving Chuck Loader

function checkStats()
    if turtle.getFuelLevel() < 1000 then
        refuel()
    end
end

function refuel()
    print( "Refueling..." )

    turtle.select(1)
    turtle.place()
    turtle.suck(64)
    turtle.refuel(64)
    turtle.dig()
end

function reverse()
    turn( "r" )
    turn( "r" )
end

function turn( direction )
    if direction == "r" then
        turtle.turnRight()

        return true
    elseif direction == "l" then
        turtle.turnLeft()

        return true
    else
        return false
    end
end

function chunkMove()
    for i=1,15 do
        turtle.forward()
    end
end

turtle.select(3)
turtle.placeDown()

os.sleep(180)

while true do
    checkStats()
    chunkMove()
    turtle.select(2)
    turtle.placeUp()
    reverse()
    chunkMove()
    turtle.select(3)
    turtle.digDown()
    reverse()
    chunkMove()
    turtle.down()
    turtle.select(3)
    turtle.place()
    turtle.up()
    turtle.forward()
    turtle.up()
    reverse()
    turtle.select(2)
    turtle.dig()
    reverse()
    turtle.down()
end