make a square image with rectangle in the middle in matlab

main.m
% Create a blank image
imageSize = 500; % Size of the image
blankImage = uint8(255 * ones(imageSize, imageSize));

% Rectangle parameters
rectangleWidth = 200;
rectangleHeight = 100;

% Calculate the position of the rectangle
topLeftX = (imageSize - rectangleWidth) / 2;
topLeftY = (imageSize - rectangleHeight) / 2;
bottomRightX = topLeftX + rectangleWidth - 1;
bottomRightY = topLeftY + rectangleHeight - 1;

% Draw the rectangle in the image
blankImage(topLeftY:bottomRightY, topLeftX:bottomRightX) = 0;

% Display the image
imshow(blankImage);
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