[video] Play random video sequence

Hi everyone, I'm new to Processing and I've been working on this video-art / installation project for my graduation.

My question is: How can I set a random video to be played next?

I managed to get the videos playing, but I can't set another random video to follow. My intention is to have a sequence of videos (maybe 10 or more) that will play in a shuffled order. I have looked around this and some other forums but couldn't find a specific answer. Hope you guys can help me out. Thanks!

ps. if something doesn't make sense in my code please tell me :)

import processing.video.*;
import processing.sound.*;

AudioIn input;
Amplitude analyzer;
int scale=4;

Movie mov1, mov2;
Capture cam;

int n = 5; //total number of videos

float vidN = random(1, n+1);
int x = int (vidN);

float vidN2 = random(1, n+1);
int x2 = int (vidN2);

void setup() {
  //frameRate (30);
  size(1280, 720);
  colorMode (HSB);
  //fullScreen();
  //background(0);

  mov1 = new Movie(this, nf(x, 2)+".mp4");
  mov1.loop();
  mov1.volume(100);

  mov2 = new Movie(this, nf(x2, 2)+".mp4");
  mov2.loop();
  mov2.volume(00);

  cam = new Capture(this, width, height);
  cam.start();

  blendMode(DIFFERENCE);

  imageMode(CENTER);

  //Create an Audio input and grab the 1st channel
  input = new AudioIn(this, 0);

  // start the Audio Input
  input.start();

  // create a new Amplitude analyzer
  analyzer = new Amplitude(this);

  // Patch the input to an volume analyzer
  analyzer.input(input);
}

void movieEvent(Movie m) {
  if (m == mov1) {
    mov1.read();
  } else if (m == mov2) {
    mov2.read();
  }
}

void draw() {
  float vol = analyzer.analyze();

  noStroke ();

  tint (255, 80);
  if (cam.available()) {
    cam.read();
    image(cam, width/2, height/2, width, height); // Draw the webcam cam onto the screen

    vol = vol*scale;

    tint (255, 100-vol*100);
    image(mov1, width/2, height/2, width, height);

    tint (255, 100-vol*100);
    image(mov2, width/2, height/2, width, height);
  }
}