一杯咖啡，只有熱氣在動

Create a 6-frame looping animation sprite sheet, 3 columns by 2 rows of equal 512x512 cells on a flat warm terracotta background. Subject: a simple white ceramic cup of black coffee on a matching saucer, flat gouache illustration with soft grain. The cup never moves or changes between cells. Only two thin ribbons of pale steam rise and curl, drifting upward a little more in each cell so that frame 6 flows back into frame 1. Keep the cup centered at the same coordinates in every cell. No grid lines, no numbers, no text, no watermark.

生成 6 幀迴圈動畫精靈圖，3 列 2 行，每格 512x512，純赤陶色背景。主體是放在同款碟子上的白瓷杯，杯中是黑咖啡，平面水粉插畫帶細顆粒。杯子在每格位置完全不變，只有兩縷細白蒸汽升起並捲曲，每格再往上飄一點，第 6 幀接回第 1 幀。不要格線、數字、文字和水印。