Example 1: A simple circuit

This is the simplest example: it just embeds a single window, with no
further usage of the mouse pointer or any widgets. In this case,
the associated NST circuit is executed repeatedly, as long as the
mouse pointer is over the window area (actually, to make the circuit
stop may require to create an X event by moving the pointer a little
while already outside the window area).

If you wish to inspect the NST circuit that belongs to the embedded window
of this or of any of the following examples, you can always "push" the circuit
into a running Neo process (to this end, the Neo process must have been
started with the command neo -i :netscape): Move the mouse pointer into
the embedded window and press function key F4. Then, move the mouse
pointer into the circuit window of the running Neo process: now a copy of the
circuit should become loaded into Neo (if Neo asks you whether to load the
circuit, you must answer yes, since Netscape will block until the "pushed"
circuit is consumed).

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