IOTQL Example - Turn on LED when Button Pressed

gistfile1.txt

CREATE THING JohnnyFiveButton WITH pin = 4, meta:name = "The Button";
CREATE THING JohnnyFiveLED WITH pin = 6, meta:name = "The LED";

CREATE RULE
    LED
WHERE
    meta:name = "The Button"
BEGIN
    SET
        state:on = $_$state:on
    WHERE
        meta:name = "The LED"
END;