halftone image - grid for circles

hello,

I'm trying to creat halftone image from grasshopper because I am trying to lasercut the facade later on. The final look of what I'm trying to create is that each area of the drawing you see from rhino screen will have differenct size of circles so that each area will have different transparency.

I trying to divide each surface and draw circles in it, but when I am done with the first area and go to the second, the grid system does not align with the other. I just need one grid system and each area needs to have different size of circles.

Is this even possible? Or is there a better way to do this?

The hole point of doing is in grasshopper is to make the circles parametric..