Is there a code that counts the number of people in front of the sensor?

Indeed. :roll_eyes:

However, the code is useless without knowing what hardware is connected to it, and how.

Therefore a schematic diagram (aka "circuit diagram") is also required.

And full details of the actual sensors you are using - please give a link.

See: 'How to get the best out of this forum' - in particular, ' Posting code and common code problems' and ' Schematics or circuit diagrams'

Some free online tools for creating schematic (and other) diagrams: