(I couldn't figure out how to stop the player adding an extra D chord after the double-barline. If I put an END on the last beat the player misses out the last chord altogether!)
A is used to indicate the first song section.
Then you can designate/adjust the number of song repeats in the player settings.
As a way to force the player to end on the final D in the coda, I split the measure and changed the time-sig, then added the "END" instruction.