See a clock on the left wall. It has 3 hands. Look right and see that one wire leads to a number panel.

Turn around and see that the other wire leads to a circle similar to the clock but it has numbers on it.

The ring at the bottom when pulled changes the number.

Look at the chart right of the entryway. It shows the movement of each arrow on the 3 hands clock. The smallest moves one space every beat; the middle sized hand moves 2 spaces at every beat and the largest moves 3 spaces at every beat.

Within the time that the hands stops on the clock, quickly add the numbers that they point to based on the circle across the clock.

Enter the sum on the number panel at right and press the button right of door before the hands move to another spot.

One strategy is to select, small numbers on the circle with numbers. Copy it on a paper. Then face the clock and anticipate the numbers the hands will point to based on the chart right of the entryway and add them before the hands point to them.

Enter the sum on the panel right of the clock. Press the button.

Pull the handle and take fragment 5.