Time is bad. We can all agree on that, right?
It's OK though because time is also good.
The trickiest thing about time is knowing when now is. Most people in our society aren't very good at knowing that without looking at something. Here is a something that you can look at.
Note that this does not include the mechanical parts that tick and tock and move and such. You must provide that, but this will give you the best possible background for it.