size(720, 120);    // canvas size
background(255);   // white background
noStroke();        // no outline on circles
fill(75, 47, 131); // UW purple

int diam = 40;

// loop for circles along the top edge
int x = ??; 
while (x <= ??) {
  ellipse(x, 0, diam, diam);
  x = ??;
}

// loop for circles along the left edge
int y = ??;
while (y <= ??) {
  ellipse(0, y, diam, diam);
  y = ??;
}