Hey guys! Pretty new to programming so im having a tinker around with this function (mousePressed). But for the life of me i cannot seem to do what i want to do!

I'm just trying to create an ellipse at the mouse location and fill it with a certain color each time i click. This is my code:

int rad = 50;                   //ellipseRadius

void setup() {
  size(300,300);
  background(255);
}

void draw () {
 
}

void mousePressed () {
  int x = mouseX;
  int y = mouseY;
  int r = 160;                   //R, B and G are just random numbers
  int b = 255;
  int g = 190;
  fill(0,0,b);
  ellipse(x,y,rad,rad);
}

So for instance, the first time i click, i want it blue, the second time i click, maybe i want it light green. No set color really. But i would like it to cycle the colors, so once it reaches the last color, it starts back at blue. Hope this makes sense :)

Any and all help would be appreciated :)


Edit** Is this where a 'case' would be a help?