I know this might be a very simple/stupid question, but how do you create a backing track that just holds a chord until it needs to change chords?

Here is a four measure example:

Measure 1: Hold Bbmaj7 for 4 beats,
Measure 2: Hold Abm7 for 2 beats, hold Db7 for 2 beats
Measure 3: Hold Gbmaj7 for 4 beats
Measure 4: Hold Em7 for 2 beats, hold A7 for 2 beats

I am just looking to create a simple backing track that holds piano or organ chords for me to play over. I do not need bass or drums on the track. Just simple held chords without rhythms or embellishments.

Thank you in advance!