Cycles in NEAT topology

I'm writing an implementation of NEAT and I am stuck on what seems like the easiest step. Say we evolved through mutations a structure like this:

[piece of art](https://www.reddit.com/user/Amanas23/comments/vpdgey/beautiful_drawing/?utm_medium=android_app&utm_source=share)

How would I then feed forward the network, if neurons in the cycle need the previous ones to calculate an output? Or do I just arbitrarily sort these neurons, and don't even allow such a connection?

neuralnetworks topology