A Stained-Glass Butterfly Opens and Closes Its Glowing Wings

Create a 6-frame looping sprite sheet, 3 columns by 2 rows of equal 512x512 cells on a dark charcoal background. Subject: a symmetrical stained-glass butterfly seen from directly above, with black lead lines and glowing cobalt, amber and ruby panes. Its body stays fixed at the center of each cell, and its wings flap by changing apparent width: fully open, three-quarter, half, narrow, half, three-quarter. The panes glow slightly brighter when fully open. Frame 6 returns to frame 1. No grid lines, no numbers, no text.