find patches of images by updating the center of the patch

how can i extract patches from the image if i have the centre of starting patch and dynamically updating the centre coordinate of the patch and extracting the patches based on that .

centerCoord = [70,75]; % intiall center of the patch
patchSourceImage = im(centerCoord(1)-ceil(patchSize/2):centerCoord(1)+ceil(patchSize/2)-1,centerCoord(2)-ceil(patchSize/2):centerCoord(2)+ceil(patchSize/2)-1); %find the patch based on the center coordinate

The next step will be to update the centre coordinate and find next patch based on that . The stride value could be 16 for updating the coordinate.