• GridLine
• direction - horizontal : 수평선 , vertical:수직선, both:수평선&수직선 을 그립니다
• horizontalChangeCount : 정의하는 숫자 만큼 줄 단위로 horizontalFill과 horizontalAlternateFill이 번갈아가며 색을 채웁니다.
• horizontalStroke : horizontalFill과 horizontalAlternateFill사이의 선을 정의합니다
• horizontalFill : 최초 시작하는 채우기 색깔 입니다
• horizontalAlternateFill : horizontalFill의 상대적인 채우기 색깔 입니다

<backgroundElements>
	<GridLines direction="both" verticalChangeCount="1" horizontalChangeCount="1">
		<horizontalStroke>
			<Stroke color="#999999" alpha="0.5" weight="1"/>
		</horizontalStroke>
		<horizontalFill>
			<SolidColor color="#EEEEEE" alpha="0.5/">
		</horizontalFill>
		<horizontalAlternateFill>
			<SolidColor color="#FFFFFF" alpha="0.5/">
		</horizontalAlternateFill>
		<verticalStroke>
			<Stroke color="#999999" alpha="0.5" weight="1"/>
		</verticalStroke>
		<verticalFill>
			<SolidColor color="#FFFFFF" alpha="0.5/">
		</verticalFill>
		<verticalAlternateFill>
			<SolidColor color="#EEEEEE" alpha="0.5/">
		</verticalAlternateFill>
		<horizontalOriginStroke>
			<Stroke color="#999999" alpha="0" weight="1"/>
		</horizontalOriginStroke>
	</GridLines>
</backgroundElements>