"Create a 16-frame sprite animation of the SAME realistic turtle walking slowly. This is a WALK CYCLE animation. CHARACTER RULES (VERY IMPORTANT): - EXACT same turtle in all frames - Same shell pattern, color, and texture - Same camera angle (side view preferred) - Same scale and position - No camera movement - No rotation - No background - White or transparent background only WALKING MOTION DETAILS: - Turtle walks slowly and heavily - One leg moves at a time (real turtle behavior) - Body shifts weight slightly left and right - Shell remains heavy and stable - Slight head forward movement with each step - No jumping or bouncing - Very grounded motion FRAME PROGRESSION: - Each frame shows a small, realistic step progression - No duplicated frames - Motion must feel slow, heavy, and natural - Smooth transition between frames STYLE: - Semi-realistic 3D turtle - Natural earthy colors - Soft lighting - Clean edges - No shadows outside turtle - No motion blur - No text or props OUTPUT REQUIREMENTS: - 16 individual PNG images - Square aspect ratio (512x512 or 1024x1024) - Transparent or white background - Consistent framing for sprite sheet usage This animation will be used in a web-based sprite sheet. Maintain PERFECT consistency across all frames. "