https://www.khanacademy.org/computing/computer-programming/programming/object-oriented/p/object-types

objectoriented.js

// Object oriented programming (from Khan Academy)
// 2 object literals
var winstonTeen = {
    "nickname": "Winsteen",
    "age": 15,
    "x": 20,
    "y": 50
};
var winstonAdult = {
    "nickname": "Mr. Winst-a-lot",
    "age": 30,
    "x": 229,
    "y": 50
};

var drawWinston = function(winston) {
    fill(255, 0, 0);
    var img = getImage("creatures/Winston");
    image(img, winston.x, winston.y);
    var txt = winston.nickname + ", " + winston.age;
    text(txt, winston.x+20, winston.y-10);
};

drawWinston(winstonTeen);
drawWinston(winstonAdult);


// the first part of object-oriented programming: creating object types and instances of those object types.
// using Object oriented programming, let's re-create the above program using a Constructor Function and new Instances.

/* the variable name and its properties (these values will be passed in as arguments)
 Winston
 - nickname
 - age
 - x 
 - y
*/
// the Constructor Function creates the object
var Winston = function(nickname, age, x, y) {
    this.nickname = nickname;
    this.age = age + "yrs old";
    this.x = x;
    this.y = y;
};

// new Instances of Winston
var winstonTeen = new Winston("Winsteen", 15, 20, 50);
var winstonAdult = new Winston("Mr. Winst-a-lot", 30, 229, 50);

// for all Winstons, run this function
var drawWinston = function(winston) {
    fill(255, 0, 0);
    var img = getImage("creatures/Winston");
    image(img, winston.x, winston.y);
    var txt = winston.nickname + ", " + winston.age;
    text(txt, winston.x+20, winston.y-10);
};

drawWinston(winstonTeen);
drawWinston(winstonAdult);
// ------------------------------------------------------------------------------------------
// Object Methods
var Winston = function(nickname, age, x, y) {
    this.nickname = nickname;
    this.age = age + "yrs old";
    this.x = x;
    this.y = y;
};

// the draw method
Winston.prototype.draw = function() {
    fill(255, 0, 0);
    var img = getImage("creatures/Winston");
    image(img, this.x, this.y);
    var txt = this.nickname + ", " + this.age;
    text(txt, this.x+20, this.y-10);    
};
// the talk method
Winston.prototype.talk = function() {
    text("I'm Winston!", this.x+20, this.y+150);
};

var winstonTeen = new Winston("Winsteen", 15, 20, 50);
var winstonAdult = new Winston("Mr. Winst-a-lot", 30, 229, 50);

winstonTeen.draw();
winstonTeen.talk();
winstonAdult.draw();
winstonAdult.talk();

// ----------------------------------------------------------
// Object Inheritance