/**
 * Array. 
 * 
 * An array is a list of data. Each piece of data in an array 
 * is identified by an index number representing its position in 
 * the array. Arrays are zero based, which means that the first 
 * element in the array is [0], the second element is [1], and so on. 
 * In this example, an array named "coswav" is created and
 * filled with the cosine values. This data is displayed three 
 * separate ways on the screen.  
 */
  size(200, 200);
  noStroke();
  
  color inside = color(204, 102, 0);
  color middle = color(204, 153, 0);
  color outside = color(153, 51, 0);
  
  // These statements are equivalent to the statements above.
  // Programmers may use the format they prefer.
  //color inside = #CC6600;
  //color middle = #CC9900;
  //color outside = #993300;
  
  fill(outside);
  rect(0, 0, 200, 200);
  fill(middle);
  rect(40, 60, 120, 120);
  fill(inside);
  rect(60, 90, 80, 80);