What can I do at the topmost floor of the Clock Tower?

You'll have noticed a strange mechanism consisting of four GREEN SQUARES attached to the clock.

You can't seem to be able to do anything with it, though.

Maybe you need to add something?

You may have already noticed something on the second floor.

If you haven't done so already, go down (back) two levels and take the gray TILES from the floor.

Climb back up, tap for a closeup of the four green squares, and drag the tiles onto them.

Do the resulting shapes remind you of something?

Try tapping the tiles to see how they change.

Do the shapes mean anything to you now?

They look like NUMBERS.

Digital display numbers.

With four slots displaying numbers, and taking into account the room you're in ...

... you can't help but be reminded of a digital clock.

It looks like you need to set the time, then.

What time, though?

Why don't you go outside for a bit. A breath of fresh air might help clear your thoughts.

As you stand next to the fountain hearing the relaxing water splashing in the background, you look up to the sky and try to think.

You're looking at the Clock Tower from the outside.

Clock Towers have clocks on them.

Notice the time.

It's 2:03.

Now go back up the Clock Tower.

If you have set the numbers to 2:03 and nothing happened, you'll need to keep thinking.

It's not the time that's wrong.

It's just that there are multiple ways to show the time.

Two ways, to be exact.

While analog clocks, like the Clock Tower external clock, can only display 12 hours, digital clocks can be more flexible.

Look at the GRAFFITI directly downstairs for one more hint if you need it.

You'll need to convert 2:03 to 24-hour format.

Set the numbers to display 14:03.

Watch in amazement as the mechanism engages, and the clockface turns blue.