do a function when an object is in a specific spot in matlab

main.m
% Create webcam object
cam = webcam();

% Set up display
h = imshow(zeros(480,640,3,'uint8'));
title('Press Ctrl-C to terminate');

while true
    % Acquire frame
    frame = snapshot(cam);
    
    % Convert to HSV color space
    hsv = rgb2hsv(frame);
    
    % Define red color range
    red_mask = (hsv(:,:,1) < 0.1 | hsv(:,:,1) > 0.9) & ...
               hsv(:,:,2) > 0.6 & ...
               hsv(:,:,3) > 0.6;
           
    % Blob analysis
    stats = regionprops('table',red_mask,'Centroid','Area');
    [max_area, idx] = max(stats.Area);
    
    % Display frame with blob centroid
    if ~isempty(idx)
        center = stats.Centroid(idx,:);
        frame = insertShape(frame,'Circle',[center 5],'LineWidth',3);
        
        % Check if object is in center of screen
        if center(1) > 310 && center(1) < 330 && ...
           center(2) > 230 && center(2) < 250
            disp('Object in center of screen!');
        end
    end
    
    % Update display
    set(h,'CData',frame);
    drawnow;
end

% Clean up
clear cam;
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