PImage bg;
PImage[] featLEye = new PImage[5];
PImage[] featREye = new PImage[5];
PImage[] featMouth = new PImage[5];
PImage[] featNose = new PImage[5];
int leye, reye, mouth, nose;
 
void setup(){
  bg = loadImage("mattface4.png");
  size(600,570);
  for (int i = 0; i < featLEye.length; i++) featLEye[i] = loadImage("le"+i+".png");
  for (int i = 0; i < featREye.length; i++) featREye[i] = loadImage("re"+i+".png");
  for (int i = 0; i < featMouth.length; i++) featMouth[i] = loadImage("mouth"+i+".png" );
  for (int i = 0; i < featNose.length; i++) featNose[i] = loadImage("nose"+i+".png");
}
 
void draw(){
  background(bg);
  image(featMouth[mouth],0,0, 600,570);
  image(featNose[nose],0,0, 600,570);
  image(featLEye[leye],0,0, 600,570);
  image(featREye[reye],0,0, 600,570);
}
 
void keyReleased() {
   if (key == 'n' || key == 'N') nose=int(random(5));
  else if (key == 'l' || key == 'L') leye=int(random(5)); 
  else if (key == 'r' || key == 'R') reye=int(random(5));
  else if (key == 'm' || key == 'M') mouth=int(random(5));
  //else if (key == 's' || key == 'S') saveFrame("face-####.tif");
}