Randomness, Focus on nothing

When you stare into a fire, you tend to meditate.
When you stare at a body of water, you tend to meditate.
It is so much easier to sleep and relax when the wind or a fan is making smooth random noise in the background.

In each case above, it is the randomness that relaxes you. It draws your consciousness into it, masking familiar patterns so your brain can relax. It doesn’t have to continually be making sense of incoming stimuli.

That randomness is essentially nothing.
You are concentrating on nothing.
Through the meditation it brings, It helps you connect to everything.