Detecting color and drawing line

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Hi guys. I'm just start OpenCV. I have some trouble to do my small project.

I want to make a program to detect orange color and draw line from middle to the orange color's average point . I have a trouble to draw line. anyone help me??

#include <opencv2/opencv.hpp> 
#include <iostream>  

int main( int argc, char** argv ) {    
cv::VideoCapture cap;   
if (argc==1) {    cap.open(0);           // open the default camera   } 
else {     cap.open(argv[1]);   }   
if( !cap.isOpened() ) 
    {  
    // check if we succeeded     
    std::cerr << "Couldn't open capture." << std::endl;     
    return -1;
    }
cv::Mat frame;  
while( 1 ) {    
    cap >> frame;   
    if( !frame.data ) break;             // Ran out of film 
    cv::Point point_of_poll = Find_poll (freame);
    if (point_of_poll.x == 0)
    draw_left;
    else if (point_of_poll < mid)
    draw_left;
    else if (point_of_poll > mid)
    draw_right;
    if( cv::waitKey(33) >= 0 ) break;   
} 
}


Point Find_poll(Mat frame){
    cv::CvSeq* lines = 0; 
    cv::Mat mask; // specify the range of colours that you want to include, you can play with the borders here
    cv::Scalar lowerb = cv::Scalar(38,125,250);
    cv::Scalar upperb = cv::Scalar(42,129,255); 
    cv::inRange(frame, lowerb, upperb, mask); // if the frame has any orange pixel, this will be painted in the mask as white
    cv::Mat storage;
    cv::Mat result;
    lines = cvHoughLines2( mask, storage, CV_HOUGH_PROBABILISTIC, 1, CV_PI/180, 50, 50, 5 );
    cv::Point Averge;
    cv::Point Averge.x = 0;
    cv::Point Averge.y = 0;
    for( i = 0; i < lines->total; i++ )
    {         
        CvPoint* line = (CvPoint*)cvGetSeqElem(lines,i);
               Average.x += line.x;
        Average.y += line.y;
    }

Average.x = Point_Average.x / lines->total;
Average.y = Point_Average.y / lines->total;

return Average // return averge point of orange poll
}