HW03-1

I used a different approach with professor.
I used constrain() function to constrain the location of the retinas inside the eye holes.
My source code is as below:

float mx, my;
void setup() {
  size(1024, 768); 
  smooth();
  background(0, 220, 0);
  noStroke();
}
void draw() {
  for (int i=100; i<800; i+=200)
  {
    for (int j=100; j<600; j+=200) {
      drawCell(i, j);
    }
  }
}
void drawCell(int i, int j)
{
  float easing = 0.05;

  fill(230, 100, 30);
  ellipse(i, j, 200, 200);

  fill(0, 0, 255);
  ellipse(i, j, 200, 100);

  fill(0);
  if (abs(mouseX - i) > 0.1) {
    mx = mx + (mouseX - mx) * easing;
  }
  if (abs(mouseY - j) > 0.1) {
    my = my + (mouseY- my) * easing;
  }

  float mx1 = constrain(mx, i-50, i+50);
  float my1 = constrain(my, j-20, j+20);

  ellipse(mx1, my1, 50, 50);
}