feature: optimized sequencer api demo

[GimmeCyy]

What this PR does:
optimized sequencer api demo

Which issue(s) this PR fixes:
#579

[codecov]

Codecov Report

Merging #600 (c034a5e) into main (3565211) will not change coverage.
The diff coverage is n/a.

❗ Current head c034a5e differs from pull request most recent head ba9743c. Consider uploading reports for the commit ba9743c to get more accurate results

@@           Coverage Diff           @@
##             main     #600   +/-   ##
=======================================
  Coverage   60.70%   60.70%           
=======================================
  Files         120      120           
  Lines        6382     6382           
=======================================
  Hits         3874     3874           
  Misses       2139     2139           
  Partials      369      369           

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[seeflood]

lgtm

[seeflood]

Thanks for your contribution!