Default [HELP NEEDED] Coverart in a circle

Hello all !

I'm turning my head wrong with this question. I want to create a media widget on my lockscreen with zooper and MU. The question is simple, but I don't find the answer.
How to put coverart in a circle that I created ? (See the picture please)

Could someone give me the way to follow ?

Thanx in advance
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Samsung Galaxy Note II GT-N7100
Android 4.3
DN3(Ditto Note 3) ROM from Electron Team(E-team)

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Null_TWRP Recovery v03

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Samsung Galaxy Tab 2 10.1 GT-P5110
Android 4.4.2
Omni ROM

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Still waiting for my Galaxy Note III / HTC WindowsPhone 8S / Polaroid Tablet Diamond 8" MIDC801