NI Assembly Election: How does the STV system work?

On 5 May 2022, voters in Northern Ireland will elect 90 MLAs to the Northern Ireland Assembly using a system called Single Transferable Vote.

Ballot papers are marked 1, 2, 3 and so on in order of preference, but how do these make up who is elected or eliminated?

BBC News NI explains the situation - using an 'emoji parliament' to show how the system works.