Create a example to show how to create conan components how to consume component?

[chenx319]

I am difficult to understand the https://docs.conan.io/en/latest/creating_packages/package_information.html#package-information-components,
can you kindly give a demo to show how to use the conan components?

create two project ,
one project create three component libs,
one project consume two of them ?
thanks!