Trying to create a two-octave ascending C Major scale using the change Staff example in NR

[Kenneth Wolcott]

Hi;

  Starting a new email thread regarding my difficulty in understanding
how to use the Lilypond \change Staff feature...

I'm trying to create a two-octave ascending C Major scale using the
change Staff example in NR.

https://lilypond.org/doc/v2.22/Documentation/notation-big-page.html#changing-staff-manually

I'm losing the lower staff. What am I doing wrong?

Please see my Lilypond source and the resulting pdf (attached).

Thanks,
Ken Wolcott

two_octave_scale.ly
Description: Binary data

two_octave_scale.pdf
Description: Adobe PDF document