Shelly UNI configuration - GATE

I made a working electric application based on Shelly Uni.

With the help of this application, I want to manage the entrance gate to the property. Opening the gate, stopping the gate and adding a temperature and humidity sensor dht22( because I had free entry).

Everything works, buttons, temperature. But I want Shelly to count down, for example, 20 seconds after opening the gate and close the gate itself.

I tried various settings, but only the output is active for a certain time and turns it off after a certain time.

And I would like that when the sensor closes the input IN1, Shelly will count down 30 seconds and then close the OUT 1 output for e.g. 1 sec, giving the signal to the gate controller to close.

thank you in advance for your help

Maybe the diagram will help in describing what I did.

And why would Shelly have to count down 30 seconds and close the contact for 1 second.