farming turtle

delay=0
function plant()
    if seedExists then
        if seed.metadata==7 then
        turtle.digDown()
        turtle.placeDown()
        end
    else
        turtle.placeDown()
    end
end

while true do
    seedExists,seed=turtle.inspectDown()
    plant()

    if turtle.detect() then
        turtle.turnRight()
        turtle.turnRight()
        while turtle.detect()==false do
            turtle.forward()
        end
        turtle.turnRight()
            if turtle.detect() then
                turtle.turnRight()
                turtle.turnRight()
                    while turtle.detect()==false do
                        turtle.forward()
                    end
                turtle.turnRight()
                turtle.turnRight()
            end
        turtle.forward()
        plant()
        turtle.turnRight()
    end
    turtle.forward()
    sleep(delay)
end