Is there a customizable timer app available?

[AC Question]

I need a timer app that will chime at 4 seconds, then again 7 seconds later and once again 8 seconds later then repeat. The alarm (chime) should be customizable also. My search has turned up nothing so far. Thanks.

 

[Rukbat]

And you probably won't. Unless that's needed for something that's pretty common, no one is going to write an app like that.