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How to change the Quick Setting Panel layout and the icons / bg

Can Anyone tell me which files to edit to change the layout and the icons , quick setting panel icon background


I wnt to change my galaxy S4 GT-I9500 Clone MT6575 quick setting icons and bg and style because they are very dirty .

i have looked into framework-res.apk and systemui.apk but could not find any thing related to quick setting panel.