AC Died, need automation help.

My AC is dying. They can't get to me until early August. It's hot

The AC runs, but after about 15 minutes, it freezes and the blower fan can't turn. So I am wanting to set up a routine so that it runs the AC for 10 minutes and then just the fan for 20. Then the AC for 10 and then just the fan for 20. Repeat until early August.

Any tips or suggestion for how to make this happen