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Hello, I want to detect contours for two colors simultaneously, here in code there is one contour for one color is detected but i want the same for second color. Please guide me.

int main ()    
 {    
    //cvNamedWindow( "RGB", 1 );   
    cvNamedWindow( "HSV", 1 );   
    //cvNamedWindow( "Binary", 1 );  
    cvNamedWindow( "LargestContour", 1 );  
    cvNamedWindow( "Final", 1 );  
    Mat img,hsv,binary;  

    img = imread("C:\\Users\\ankit\\Downloads\\wallpaper\\p.png"); //change this path according to your image file path  
   // imshow("RGB",img);  

    //convert RGB image into HSV image  
    cvtColor(img, hsv, CV_BGR2HSV);  
    imshow("HSV",hsv);  

    //get binary image  
    inRange(hsv, Scalar(0, 255, 255), Scalar(179, 255, 255), binary);  
   // imshow("Binary",binary);  

    //find contours from binary image  
    int i;  
    vector< vector<Point> > contours;  
    findContours(binary, contours, CV_RETR_TREE, CV_CHAIN_APPROX_SIMPLE); //find contours  
    vector<double> areas(contours.size());  
    //find largest contour area  
    for(i = 0; i < contours.size(); i++)  
    {  
        areas[i] = contourArea(Mat(contours[i]));  
    }  
    //get index of largest contour  
    double max;  
    Point maxPosition;  
    minMaxLoc(Mat(areas),0,&max,0,&maxPosition);  
    //draw largest contour.  
    drawContours(binary, contours, maxPosition.y, Scalar(255), CV_FILLED);  
    imshow("LargestContour",binary);  

    //draw bounding rectangle around largest contour  
    Point center;  
    Rect r;  
    if (contours.size() >= 1)  
    {  
        r = boundingRect(contours[maxPosition.y]);  
        rectangle(img, r.tl(),r.br(), CV_RGB(255, 0, 0), 3, 8, 0); //draw rectangle  
    }  
    //get centroid  
    center.x = r.x + (r.width/2);  
    center.y= r.y + (r.height/2);  

    //print x and y co-ordinates on image  
    char x[15],y[6];  
    itoa(center.x,x,10);  
    itoa(center.y,y,10);  
    strcat(x,",");  
    putText(img, strcat(x,y), center, FONT_HERSHEY_COMPLEX_SMALL, 0.8, cvScalar(255,0,0), 1, CV_AA);  
    imshow("Final",img);  

    //wait for key press  
    cvWaitKey();  
    return 0;    
 }

Thank you very much in advance.