The expansion is simply digging holes out of the sandbox, shaping that sand into a cool new complex shaped part, and then gently nudging it back into place

The expansion occurs when the universes matter is in a state of nothing but 100% photons (bar magnets) that do possess mass, but do not exert gravitation onto one another because they are bar magnet shapes.
When the Universe is 100% photons, the emergent magnetic field from their combined total, changes and fluctuates like mad because they are going whatever way outwards expanding as particles do

If two photons get close enough together, they form a new singular shape with a new magnetic field that does then both get pulled, as well as pull.
And the magnetic field from the combined total of the entire universes parts working together as a higher sound wave like emergence, then changes shape into one that would appear collapsing

This balancing ratio bounces back and forth, between the two states as the amount of photon to non photon state occurs.

Expands out, dig out the sand, make complex parts from the stellar factories, move the parts back

When the universe becomes more "other" than photons it pulls back inwards again
But the big crunch should be gentle because of all the parts the universe built that will act like a spring and absorb the bouncing

Basically our universe has X amount of building block pieces in it
Pi
That amount combines together all over the universe to create its own overwatch emergent magnetic field, the same as a smaller galaxy does, stars do, planets, people, I have magnetism Gregg...can you milk me?

I have not even re-read this post it could be totally crazy
I am far too crazy to be allowed uncensored unsupervised internet access
This is the type of shit that gives the Chinese Authorities nightmare goggles
Lunatics with access to esoteric rune magic spell type font