Hi. I'm fairy knew to processing but I'm doing a project where I need each individual ellipse to change a different color when I click it. At the moment I have no idea how to do that. Here's what I have so far:

PImage brain;
//string word[]{"homework","boyfriend","food","coffee","hate","love","college","oregon","no","yes","beer","party","late","time","class","money"};
//int amount[]{31,150,21,60,72,231,23,43,240,130,12,62,15,65,111,86};
//int level[]{5,5,2,2,5,4,5,1,3,2,5,4,5,2,2,5};
boolean circle1 = false;
boolean circle2 = false;
boolean circle3 = false;
boolean circle4 = false;
boolean circle5 = false;
boolean circle6 = false;
boolean circle7 = false;
boolean circle8 = false;
boolean circle9 = false;
boolean circle10 = false;
boolean circle11 = false;
boolean circle12 = false;
boolean circle13 = false;
boolean circle14 = false;
boolean circle15 = false;
boolean circle16 = false;

void setup(){
  size(800,800);
  //brain = loadImage("image.png");
  //brain.resize(800,800);
  //background(brain);
  smooth();
  stroke(58,111,222);
}

void draw(){
  //background(brain);
  //circle1,homework
  fill(222,119,71,70);
  ellipse(620,351,36,36);
  //circle2,boyfriend
  fill(222,119,72,70);
  ellipse(609,450,150,150);
  //circle3,food
  fill(222,119,73,70);
  ellipse(581,358,21,21);
  //circle4,coffee
  fill(222,119,74,70);
  ellipse(531,368,60,60);
  //circle5,hate
  fill(222,119,75,70);
  ellipse(573,301,72,72);
  //circle6,love
  fill(222,119,75,70);
  ellipse(147,455,231,231);
  //circle7,college
  fill(222,119,76,70);
  ellipse(521,411,23,23);
  //circle8,oregon
  fill(222,119,77,70);
  ellipse(504,306,43,43);
  //circle9,no
  fill(222,119,78,70);
  ellipse(444,170,240,240);
  //circle10,yes
  fill(222,119,79,70);
  ellipse(427,425,130,130);
  //circle11,beer
  fill(222,120,71,70);
  ellipse(472,350,12,12);
  //circle12,party
  fill(222,121,71,70);
  ellipse(437,323,62,62);
  //circle13,late
  fill(222,122,71,70);
  ellipse(375,297,15,15);
  //circle14,time
  fill(222,123,71,70);
  ellipse(356,343,65,65);
  //circle15,class
  fill(222,124,71,70);
  ellipse(244,264,111,111);
  //circle16,money
  fill(222,125,71,70);
  ellipse(298,399,86,86);
 
}

How can I get it so that each ellipse changes color?