Simulating short bursts

I want to know a better way to create a scenario for short bursts.

My test is designed to make 10000 http calls to the server every hour.

4000 calls sent at constantly
(scenario.inject(constantUsersPerSec(1.1) during (3600 seconds))

Remaining 6000, I want to sent at short bursts of 1000 calls every 10 minutes.

What is the better way to design this. I don’t want to reach an RPS and hold on to it