light automatic on off ac dc 8 pin relay connection

A timer relay is a combination of an electromechanical output relay and a control circuit the contacts will open or close before or after a preselected timed interval.
what is an 8 pin relay
the relay works on the principle of electromagnetic force when the coil is energized it becomes magnetized in an 8 pin relay as shown here there are 2 common contacts 2 normally open contacts and 2 normally closed contacts relays control one electrical circuit by opening and closing contacts in another circuit.

Thanks for watching........

Music in this video
Adventures by A Himitsu https://www.youtube.com/channel/UCgFwu-j5-xNJml2FtTrrB3A
Creative Commons — Attribution 3.0 Unported— CC BY 3.0 http://creativecommons.org/licenses/by/3.0/
Music released by Argofox https://youtu.be/8BXNwnxaVQE
Music provided by Audio Library https://youtu.be/MkNeIUgNPQ8