You set the arrow towards the time ( the actual time on any other clock in your house) then you only raise up the pins for 6 hours. Those 6 hours wont get any light. Try setting it so that light is on during the day, it'll less attract unwanted attention from your neighbors/snitches/fucking rats
Anyone that can't figure out how to set a timer should not be growing. If you can't figure out something so basic then you're going to fail from the start.
Wholy crap man you need to post it 2 times, again if you can not work a timer you will not be able to grow a plant, the plant is much harder than a timer, go buy a sack save your time and money