Building blocks

My entry for =f--l--A--r--k's Apophysis Challenge #16, geometric designs. A Sierpinski built entirely from squares, and with a slight twist to remove symmetry and give a more free-flowing look.

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<xform weight="0.25" color="0" rectangles="1" coefs="0.5 0 0 0.5 0.5 -0.5" rectangles_x="0.1" rectangles_y="0.25" chaos="0 0 0 0 " plotmode="off" opacity="0" />
<xform weight="0.25" color="0.922" symmetry="0.5" linear="1" coefs="0.5 0 0 0.5 0.5 0.5" chaos="1 1 1 1 0 " opacity="1" />
<xform weight="0.25" color="0.922" symmetry="0.5" linear="1" coefs="0.5 0 0 0.5 -0.5 0.5" chaos="1 1 1 1 0 " opacity="1" />
<xform weight="0.25" color="0.922" symmetry="0.5" linear="1" coefs="0.5 0 0 0.5 -0.5 -0.5" chaos="1 1 1 1 0 " opacity="1" />
<xform weight="0.5" color="0" symmetry="1" blur_pixelize="1" coefs="1 0 0 1 0 0" blur_pixelize_size="0.1" blur_pixelize_scale="0.8" chaos="1 1 1 1 0 " opacity="1" />
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</flame>