Elegant Motivational Achievement GIFs

I need a small collection of animated GIFs that users will receive inside our mobile app whenever they hit a new milestone. The look has to stay true to our brand: elegant, clean, and minimalistic—no loud colours or busy patterns—yet each loop should instantly spark motivation and a sense of achievement.

Here’s what matters most to me:
• Theme & mood: minimal lines, refined colour accents, smooth motion; every frame should feel premium and uplifting.
• Occasion: they celebrate milestones (level-ups, streaks, goals reached), so the animation needs to read “well done—keep going” at a glance.
• Technical fit: lightweight files that loop seamlessly, render crisply on both retina and standard screens, and remain under 500 KB each for quick delivery in-app. Transparent or solid neutral backgrounds are both acceptable as long as the artwork stays elegant.
• Handoff: finished GIFs plus the editable source files (PSD, AE, or similar) in case we want to localise text later.

If you’ve crafted subtle, motivating animations before, show me a few links or attachments along with how many concepts you can deliver and your estimated turnaround time. Looking forward to seeing your ideas breathe life into our achievement system.