Gas Pulse in Molflow

I have a quick question regarding Molflow simulation.  I need to simulate a gas pulse into a vacuum system with a certain flow rate and frequency.  Is it possible to simulate this in Molflow?  I can simulate the gas burst for just one burst or a few burst, but I am not sure how to simulate the gas pulse where the gas flows constantly at certain flow rate and frequency.

For other users, I'm replying here as well - the process is described here and in your case the first few periods of the gas pulses can be simulated, similar to this: