Generate a seamless looping video for display ads

**Seamless 4-second loop — Pulse smart-ring display ad**

Subject: the Pulse ring resting on a small frosted-glass pedestal, dead-center. Motion: a slow, perfectly even 90° rotation of the ring on the pedestal, paired with a soft cyan glow that pulses up and back down once across the four seconds — echoing a heartbeat.

The loop is engineered to be invisible: the ring's rotation speed and the glow's brightness curve are timed so the final frame matches the first frame exactly — same ring angle (the seam falls on a symmetrical face of the band), same glow intensity at its baseline. No cuts, no jump, no stutter at the wraparound.

Camera is locked completely static. Background is a clean dark-charcoal gradient backdrop (#14161C) with a subtle radial vignette that keeps the eye on the ring and the cyan accent. No text baked in, leaving room for a headline lockup in the ad unit.

Delivered in both 1:1 (for square display placements) and 16:9 (for leaderboard/banner units), 4 seconds, set to autoplay-loop. If any micro-seam shows on render, a 2-frame trim at the wrap point cleans it perfectly.