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<?phpecho draw_table(create_grid(25, 0, 256));function create_grid($size, $start_colour, $end_colour){	$step = ($end_colour - $start_colour) / $size;		$current_colour = $start_colour;	$colours = array();	$colours[] = null;	for ($i = 0; $i <= $size; $i++)	{		$colours[] = ceil($current_colour);		$current_colour += $step;	}	$grid = array();	for ($i = 0; $i <= $size; $i++)	{		$pad = array();		for ($x = 0; $x < $i; $x++)		{			$pad[] = $end_colour;		}		array_shift($colours);		$grid[] = array_merge($colours, $pad);	}	return $grid;}function draw_table($grid){	$html = "<table cellspacing=0 cellpadding=0>\n";		for ($i = 0; $i <= count($grid); $i++)	{		$html .= "<tr>";		for ($x = 0; $x <= count($grid); $x++)		{			$html .= "<td height=10 width=10 bgcolor=\"#0000" . sprintf("%02x", $grid[$i][$x]) . "\">";		}		$html .= "</tr>\n";	}		$html .= "</table>";		return $html;}?>