Is it possible to repeat a macro, or is that illegal?

[SamSmoot]

Hitting Synthesize and the macro button is kind of tedious, so I was wondering if there's a way to repeat that process? If not, is it legal to make a local macro that does this?

I position my current macro button on the top, mostly empty bar, then put the synth button right on top of it. Also, put a 2 second delay at the start of the macro so you don't start running commands before the synth is ready if you click the macro too soon.
Then, I just position the cursor on synth, click twice, and do something else while it completes.{