Hi everyone ! I and buddihka found all the parts and starts to put all the parts on the board. There is a problem about the relay: if the relay is five pin. then which pin is which. 30,85,86,87,87A we looked the website: 85 and 86 is for the coil. 30 is for the positive 12V in 87A and 87 one is for the low beam, one is for the high beam. Relay Diagram Bottom View after all the parts put on the board and connect to the power supplier and the relay. it's working. We use brake/park light for the low/high beam. using the hand block the LDR the relay switched the low beam to the high beam. removed the hand, the light switch from the high beam to the low beam. The diagram on the website is right. Week three for the Technology Project.