Urn Automator

while true do
    redstone.setOutput("top", true);
    redstone.setOutput("front", false);
    urn = peripheral.wrap("right").getBlockMeta(-1,0,0).state.urntype;
    print(urn);
    if urn == "EMPTY" then
        redstone.setOutput("top", false);
        os.sleep(.2);
        redstone.setOutput("top", true);
    elseif urn == "FULL" then
        redstone.setOutput("front", true);
        os.sleep(.2);
        redstone.setOutput("front", false);
    end
    os.sleep(0);
end