Making Ardino code for wired remote control for recordingdevice

I need help with the code. Helping a friend with no sight, he wants a wired remote ( REC - STOP function) to the Olympus LS12, that vibrates every 7 seconds when it records. It will be powered by the output of the Olympus internal 3.3V, and therefore must use a little as possible power, because changing batteries often is hard for my friend. One pushbutton for REC and STOP. First push, REC: LED1 ([login to view URL]) blinking continually every 7 seconds for 200ms LED2 blinks ONE time for 120ms (sends message to recorder to start recording) Second push, OFF: LED1 ([login to view URL]) and LED2 off. LED3 (or something similar) making a circuit to ground (see image for sketch)