//week1_ellipses by Zach Eveland for Intro to Computational Media
//draws a number of ellipses, one inside the other, all butted up against the left side
//not interactive, not animated, just draws the ellipses.

void setup() {
  size(400, 200);
}

void draw() {
  int interval = 4;  //amount to adjust coordinates by
  int x = 200;    //starting ellipse x coordinate (y coordinate is fixed for all ellipses)
  int w = 380;    //starting ellipse width
  int h = 180;    //starting ellipse height
  int c = 255;    //starting greyscale value to use for fill

  background(255);
  stroke(0);
  smooth();
  
  for(int i = 0; i <= 20; i += 1 ) {
    fill(c);
    ellipse(x, 100, w, h);
    x = x - 2 * interval;  //moves the next ellipse to the left
    w = w - 4 * interval;  //makes the width of the next ellipse smaller
    h = h - 2 * interval;  //makes the height of the next ellipse smaller
    c = c - 12;    //decrements the greyscale for the next ellipse
  }
}