I'm new to processing and I need some help with combining simple color tracking and drawing by Daniel Shiffman. Here are the example codes I'm trying to use:

Color Tracking
// Learning Processing
// Daniel Shiffman

// Example 16-11: Simple color tracking

import processing.video.*;

// Variable for capture device
Capture video;

// A variable for the color we are searching for.
color trackColor;

void setup() {
 size(320,240);
 video = new Capture(this,width,height,15);
 // Start off tracking for red
 trackColor = color(255,0,0);
 smooth();
}

void draw() {
 // Capture and display the video
 if (video.available()) {
   video.read();
 }
 video.loadPixels();
 image(video,0,0);

 // Before we begin searching, the "world record" for closest color is set to a high number that is easy for the first pixel to beat.
 float worldRecord = 500;

 // XY coordinate of closest color
 int closestX = 0;
 int closestY = 0;

 // Begin loop to walk through every pixel
 for (int x = 0; x < video.width; x ++ ) {
   for (int y = 0; y < video.height; y ++ ) {
     int loc = x + y*video.width;
     // What is current color
     color currentColor = video.pixels[loc];
     float r1 = red(currentColor);
     float g1 = green(currentColor);
     float b1 = blue(currentColor);
     float r2 = red(trackColor);
     float g2 = green(trackColor);
     float b2 = blue(trackColor);

     // Using euclidean distance to compare colors
     float d = dist(r1,g1,b1,r2,g2,b2); // We are using the dist( ) function to compare the current color with the color we are tracking.

     // If current color is more similar to tracked color than
     // closest color, save current location and current difference
     if (d < worldRecord) {
       worldRecord = d;
       closestX = x;
       closestY = y;
     }
   }
 }

 // We only consider the color found if its color distance is less than 10.
 // This threshold of 10 is arbitrary and you can adjust this number depending on how accurate you require the tracking to be.
 if (worldRecord < 10) {
   // Draw a circle at the tracked pixel
   fill(trackColor);
   strokeWeight(4.0);
   stroke(0);
   ellipse(closestX,closestY,16,16);
 }
}

void mousePressed() {
 // Save color where the mouse is clicked in trackColor variable
 int loc = mouseX + mouseY*video.width;
 trackColor = video.pixels[loc];
}


Drawing
// Learning Processing
// Daniel Shiffman

// Example 3-4: Drawing a continuous line
void setup() {
 size(200, 200);
 background(255);
 smooth();
}

void draw() {
 stroke(0);
 // Draw a line from previous mouse location to current mouse location.
 line(pmouseX, pmouseY, mouseX, mouseY);
}


Is that possible to combine both color tracking and drawing into one program? Any help will be appreciated.

Thanks!