Here is some help to install layout ^^
(LJ changes its settings again, so I give you two pics in some numbers, follow whichever that suits your LJ version; the new or old one)
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1. (go to your user info)
or
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2. (write 'flexible squares' in the box then click 'search')
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3. (choose whichever you want)
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4. (choose the column base on the layout)
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5. (then click this)
or
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6.
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7.
I hope it's helpful XD