git clone https://github.com/aantron/repromise.git
git clone https://github.com/aantron/repromise_lwt.git
cd repromise
opam pin add -y repromise .
opam install -y lwt
cd ../repromise_lwt
dune exec test/test.exe

This should print Tick! five times, wait for one second, then print a few more messages. See test/test.re for the program.

The example creates a Repromise-aware sleep function by wrapping Lwt_unix.sleep, then exercises it a little bit.