Redwood chop

-- Loosely based on http://pastebin.com/y8vXg8ew

function chop()
    turtle.select(1)
    -- Up one side
    while turtle.compareUp() do
        turtle.dig()
        turtle.digUp()
        turtle.up()
    end
    turtle.dig()

    -- Go to the other side
    turtle.turnRight()
    turtle.dig()
    turtle.turnLeft()

    -- Down other side
    turtle.dig()
    turtle.digDown()
    turtle.down()

    -- Check for more
    turtle.turnLeft()
    if turtle.compare() then
        turtle.dig()
        turtle.forward()
        turtle.turnRight()
        while turtle.compareUp() do
            turtle.dig()
            turtle.digUp()
            turtle.up()
        end
        turtle.dig()
        turtle.up()
    end
end

function orient()
    turtle.turnLeft()
    if not turtle.detect() then
        turtle.turnRight()
    end
end

print("Welcome to Portablejim's")
print("giant redwood cutting program")
print(" ")
print("Replace a redwood log with the turtle")
print("and place the log in slot 1")
print(" ")
print("Hit enter when ready")
read()
chop()