Press a key to make a video glitch.

Hello,

So I am very new to processing (I started doing stuff a couple of weeks ago) and I am trying to work on an art project. It is super simple, really...All I need to do is have the webcam running, and when a key (any key) gets pressed it the camera glitches for about three seconds and then it resumes the regular streaming until pressed again. So far I have the code to activate the webcam, and I found a code online that creates the glitch that I like, but I do not quite understand how to combine both codes. Sorry if this is not the proper way to do it but I really need help.

Thanks!

import processing.video.*; Capture webcam;

void setup() {
  size(displayWidth,displayHeight);
  webcam = new Capture(this,1280,720);
  String[] devices = Capture.list();
  println(devices);
  webcam.start();

}

void draw() {
  if (webcam.available() == true) {
    webcam.read();
    image(webcam ,0,0);
  }

}

void keyPressed() {
  switch (key) {
    case 'g': ;
    case 'c': ;
    case 'f': ;
    case 'F': ;
  }

  }

And here's the glitch video

import processing.video.*;

Capture cam;

int N=0;

void setup(){
    size (851,315);
    background(255);
    colorMode(HSB);
    String[] cameras = Capture.list();

if (cameras.length == 0) {
    println("There are no cameras available for capture.");
    exit();
    } else {
    println("Available cameras:");
    for (int i = 0; i < cameras.length; i++) {
    println(cameras[i]);
}

    cam = new Capture(this, cameras[0]);
    cam.start();
    }
}


void draw(){

Set();
    if (cam.available() == true) {
    if(frameCount==2||frameCount%150==0){
    cam.read();
    image(cam, 0, 0);

    }
}



int r(int a){
    return int(random(a));
    }

void mouseReleased (){
N++;
save("glitchCamera"+ (N)+".tif");
}

void Set() {
for (int i=0; i<10; i++) {
int x = r(width);
int y = r(height);
set(x+r(50)-1,y+r(3)-1,get(x,y,r(99),r(30)));
}
}