hehe, "The pain in the ass technique"

created a grid then took a circle, copied it, placed it, selected the two, copy them, place them, selected the four, copy them, place them, selected the eight, copy them, place them, etc. etc. etc.
after a while , the multiply-ing goes faster and faster..
after that take out the parts not needed.. almost the same like the zaccaria i made:


Since this has a "white" surrounding, i was forced to cut some dots.
here is the Zacc complete

for gradient, i use
this method that i found somewhere online.