Hello,
I have uploaded stock bootsamsung.qmg and bootsamsungloop.qmg for you.
Download the stock .qmg files from here (
https://www.mediafire.com/?vsg287sjeyjg645 )
Download ROM Toolbox Lite from Android Play Store.
Extract the .qmg files from the archive and paste them into your SD card.
Go to ROM Toolbox Lite and under Interfact go to Boot Animation.
Then go to system>media and delete the Custom bootsamsung.qmg and bootsamsungloop.qmg and paste the files which I've provided there which is there in your SD card.
Reboot your Grand.
Enjoy.
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