------Tunneling Automaton - V2------

----Variables----

t = turtle

----Basic Controls----

function digForward()
    t.digForward()
end
function moveForward()
    t.forward()
end
function goForward()
    if t.detect() then
        digForward()
        moveForward()
    else
        moveForward()
    end
end

function length()
    num = t.getItemCount(2)
    return num
end

function refuel()
    t.select(1)
    t.refuel(1)
end

----Bridge----

function bridge()
    t.select(2)
    num = length()
    while num > 0 do
        goForward()
        t.placeDown()
        num = num - 1
    end
end

----Main----
function main()
    refuel()
    bridge()
end

--Run--
main()