That's looking really nice. [honesty]
I guessed you had used the same strip for the stripes in your previous image - and it looks just that, the same piece rotated and put at the edges.
If you created a layer(s) with your stripes the same size as the image, a layer mask or select/delete would give the 'window' in the middle but with the stripes 'lining up'.
This is to quickly illustrate my meaning, I think your image has better detail
I guessed you had used the same strip for the stripes in your previous image - and it looks just that, the same piece rotated and put at the edges.
If you created a layer(s) with your stripes the same size as the image, a layer mask or select/delete would give the 'window' in the middle but with the stripes 'lining up'.
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This is to quickly illustrate my meaning, I think your image has better detail