Free Hero Mesh

%X
  Display a unsigned hexadecimal number in uppercase.

%%
  Display a percentage sign; does not consume an argument.

%(
  Begin a conditional block, of the form "%(true-part%|false-part%)" or
  "%(true-part%)". Consumes one argument; if zero then the false-part is
  used (or nothing, if there is no false-part), or if nonzero then the
  true-part is used. Conditional blocks cannot be nested.

%|
  Else part of a conditional block. See above about conditional blocks.

%)
  End of a conditional block. See above about conditional blocks.

%<
  Unconsume one argument. (Does not produce any output.)

%>
  Skip one argument. (Does not produce any output.)


=== Messages ===

This section describes when the various standard messages are sent to
objects, and what return values are expected. (Do not confuse CREATE with
CREATED, or DESTROY with DESTROYED, or COLLIDE with COLLIDING; they have
different purposes.)