Code
//Matthew Finder's Assignment 0205
size(500,500);
background(119,119,119);
noStroke();
smooth();
for (int i=90; i>=10; i=i-15){
for(int x=450; x>=50; x=x-100){
for(int y=450; y>=50; y=y-100){
fill(255-(i*2.83));
ellipse(x,y, i,i);
}
}
}
0205 - Gradual buildup of a complex design: Another for{} loop
Statement:Add yet another repetition structure around the previous assignment, in order to create the design shown here: 
If you've done this correctly, step back and take a look at that - you've made a triple for{} loop!
Matthew Finder's Assignment 0205