Replace stuff with stone

function PlaceStone()
    turtle.digDown()
    turtle.select( 1 )
    if turtle.compareTo( 9 ) == false then
        turtle.drop()
    end
    for x=1,9 do
        if turtle.getItemCount( x ) == true then
            turtle.select( x )
            turtle.placeDown()
        end
    end

end


for x=1,9 do
    if turtle.getItemCount( x ) == true then
        turtle.select( x )
        if turtle.compareDown() == false then
            PlaceStone()
        end
    end
end