class MyRect{                    // creates a class named MyRect  
  int rectSize;                  // creates a property (aka instance variable) called rectSize of type int
  color rectColor;               // creates a property called rectColor that will store a color object
  int x;                         // creates a property called x that will store an int
  int y;                         // creates a property called y that will store an int
  
  MyRect(int rSize, color rColor, int rx, int ry) {      // defines the method used to create a MyRect object...
                                                         // ... this method accepts four parameters....
                                                         // ... the first is an int for the size, the second is...
                                                         // ... a color object, and the last two are ints
    rectSize = rSize;       // sets the property rectSize to equal whatever was received in rSize
    rectColor = rColor;     // sets the property rectColor to equal whatever was received in rColor
    x = rx;                 // sets the property x to equal whatever was received in rx
    y = ry;                 // sets the proeprty y to equal whatever was received in ry
  }
  
  void display() {
    fill(rectColor);                  // set the fill color to be whatever is store in this object's rectColor property
    rect(x,y, rectSize, rectSize);    // draw the rectangle using the x,y and rectSize properties of this object
  }
}
MyRect[] rects;                       // create an variable named 'rects' that will store an array MyRect objects
void setup() {
  size(500,500);
  rects = new MyRect[50];             // create the array of MyRect objects and store it in the variable we created earlier
  for(int i=0;i<50;i++) {             // loop from 0 to 49
    color c = color(random(255), random(255), random(255), random(255));                    // create a color object with random values (the 4th value is transparency)
    rects[i] = new MyRect(int(random(200)), c, int(random(width)), int(random(height)));    // create a new MyRect object and store it in our array
  }
  noStroke();                         // draw all shapes without a border
}

void draw() {
  background(0);                             // set the background to black
  for(int i=0; i<rects.length; i++) {        // loop from 0 to the count of how many items are in our rects array
    rects[i].display();                      // call the display method of the current item in the array
  }
}