Header of page Should be formatted as follows: light red background, thick red border at the bottom, a sequence of background images repeated horizontally. Background images and the text should be oriented normally (reference-orientation="0"), and aligned to the bottom (i.e. stuck to the central region). This region should extend to the corners (precedence="true"). Footer of page Should be formatted as follows: light green background, thick green border at the top, a sequence of background images repeated horizontally. Background images and the text should be turned upside down (reference-orientation="180"), and aligned to the bottom (i.e. stuck to the central region). This region should extend to the corners (precedence="true"). Left sidebar of page Should be formatted as follows: light blue background, thick blue border at the bottom, a sequence of background images repeated vertically as a strip along the median of the region. Background images and the text should be rotated by 90° clockwise (reference-orientation="90"), and aligned to the bottom (i.e. stuck to the central region). This region should not extend to the corners (precedence="false"). Right sidebar of page Should be formatted as follows: light yellow background, thick brown border at the top, a sequence of background images repeated vertically as a strip along the median of the region. Background images and the text should be rotated by 90° counterclockwise (reference-orientation="270"), and aligned to the bottom (i.e. stuck to the central region). This region should not extend to the corners (precedence="false"). Header of page Should be formatted as follows: light red background, thick red border at the bottom, a sequence of background images repeated vertically as a strip along the median of the region. Background images and the text should be turned upside down (reference-orientation="-180"), and aligned to the top (i.e. stuck to the central region). This region should not extend to the corners (precedence="false"). Footer of page Should be formatted as follows: light green background, thick green border at the top, a sequence of background images repeated vertically as a strip along the median of the region. Background images and the text should be oriented normally (reference-orientation="0"), and aligned to the top (i.e. stuck to the central region). This region should not extend to the corners (precedence="false"). Left sidebar of page Should be formatted as follows: light yellow background, thick brown border at the bottom, a sequence of background images repeated horizontally. Background images and the text should be rotated by 90° clockwise (reference-orientation="-90"), and aligned to the top (i.e. stuck to the central region). This region should extend to the corners (precedence="true"). Right sidebar of page Should be formatted as follows: light blue background, thick blue border at the top, a sequence of background images repeated horizontally. Background images and the text should be rotated by 90° counterclockwise (reference-orientation="-270"), and aligned to the top (i.e. stuck to the central region). This region should extend to the corners (precedence="true"). Side Regions - Borders, Background, Reference Orientation This document tests borders and backgrounds on side regions, with special emphasis on reference orientation. This document tests borders and backgrounds on side regions, with special emphasis on reference orientation. This document tests borders and backgrounds on side regions, with special emphasis on reference orientation. This document tests borders and backgrounds on side regions, with special emphasis on reference orientation. This document tests borders and backgrounds on side regions, with special emphasis on reference orientation.