Those colored boxes are splashes. Most splash archives are missing 3 files preview.png, icon.png, info.smdh.
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Here’s a pic of what I’m talking about
I hope music looping gets fixed.
That’s the only reason I still use the sketchy app Themely. I’d help but, computer is busted. I’m a noob coder. The sooner it gets fixed the sooner I delete Themely.