Fill with Holes

[DickDye]

I would like to create a US flag. I’m not sure how to create the field (the blue part). I want the blue to be a “fill” area and the stars to be unfilled. I don’t know how to create a fill area with holes. Any suggestions?

[LaserCuttingPro (Neil)]

Just create a box, and put the stars inside it, all on the same layer set to fill

[DickDye]

Thanks!
Putting the stars and field on one layer did it. I kept trying them on separate layers…