Stupid question... how can I do this?

[Special]

Hello!

I'm not entirely sure how to post stuff on this website, but I'm hoping someone can help me anyway. I apologize if my question is in the wrong subforum.

Since I'm not allowed to post links...

i.imgur.com
/ep73erJ.jpg

I'm wondering how I can create a background similar to this? (Mainly the circle shapes) I'm fairly clueless when it comes to things like this.

Thank you!

 

[Paul]

Halftone on layers might help you.