What is a brief description of the assembly area in chapter five of Lord of the Flies?

In Chapter Five, Ralph calls an assembly "to set things
right."  In Chapter 4,  Jack's group had let the fire go out, and the boys missed an
opportunity to signal a passing boat.  Now, Ralph wants to reestablish order.  He knows
that this meeting must be "business, not fun."

Golding goes
to great lengths to describe the place of the assembly.  It resembles a triangle.  Ralph
always sat on a log facing the island, so that he appears in silhouette to the boys
facing the lagoon.  To the right and left of him are logs that the others sit on.   The
littluns sit on the smaller logs to the left while the others sit on the more polished
log on the right.  Golding gives us these details to show that the meetings have become
a ritual, so much so that everyone has his habitual seat, the same logs are upended, and
the grass is worn where the boys' feet were placed.

But
this meeting is different.  Ralph tries to lay down the law.  He makes several executive
decisions about the need for shelters, where the lavatory will be, keeping the signal
fire going at all times, and not having any small cooking fires elsewhere.  Then he
allows for discussion on one topic:  the beastie.  In an attempt to squelch the fear on
the item, Ralph attempts to address it head on.  But the boys' discussion ends in chaos,
and Ralph loses control of the meeting and of the boys.  He is never to exert this much
power again.