/**
 * North Sea: analyse colour and light. 
 * Mouve the mouse over the image.
 
 */

PImage wall;

void setup() {
  size(600, 651);
  wall = loadImage("sea2.jpg");
  stroke(255);
}

void draw() {
  background(wall);
  color c = get(mouseX, mouseY);
  float r = red(c); // Extract red
  float g = green(c); // Extract green
  float b = blue(c); // Extract blue
  fill(c);
  rect(420, 490, 100, 80);
  fill(r, 0, 0);
  rect(80, 80, 100, 80); // Red component
  fill(0, g, 0);
  rect(180, 80, 100, 80); // Green component
  fill(0, 0, b);
  rect(280, 80, 100, 80); // Blue component
}