Also Robbie, another way is to open Grahame Hutchison's excellent 16R ADSB site and under "Contents" click on "Live Status" which gives you a diagram of the SYD runways with the ones in use shown by a moving plane plus other data such as wind speed, direction etc. I use Grahame's Live Map for tracking inbound and outbound airborne aircraft up to 250nm from SYD and also while on the ground.

This link will take you directly to the status page: https://adsb.16right.com/status