Animate the object as TWO distinct soft spherical metaballs fused together. The key visual eff...

Animate the object as TWO distinct soft spherical metaballs fused together. The key visual effect is a true 3D metaball / blob effect: two clearly recognizable rounded spheres are connected by a smooth, short, organic neck of the same material. They behave like two blobs of soft liquid or silicone that are attracted to each other. The two spheres gently move closer together and then slightly apart in a slow, continuous cycle. The movement amplitude is SMALL. IMPORTANT: The two spherical masses must remain clearly visible as two separate rounded volumes throughout the animation. Do NOT stretch one sphere into a long shape. Do NOT create a large elongated body. When the spheres move closer, the connecting neck becomes thicker and the two spheres partially merge into each other, creating a smooth seamless metaball transition. When they move slightly apart, the neck becomes narrower and shorter, but the two spheres ALWAYS remain connected. The connection must look like a natural metaball surface, with a smooth concave transition between the two rounded masses. The surface must remain perfectly smooth and continuous, with no wrinkles, folds, pinching, radial creases, cloth-like deformation, or skin-like stretching. Think of two blobs of thick liquid or soft gelatin merging and separating slightly — NOT two objects inside a bag, NOT fabric, NOT rubber being stretched. The spheres should maintain approximately the same volume and remain mostly spherical. Only the area where they touch should deform noticeably. Movement is calm, slow, subtle and organic, with very gentle easing and no sudden movements. Preserve the original green glossy material, lighting, background, camera angle and framing. The camera is completely static. No rotation of the camera. No additional objects. No splitting apart. No excessive stretching.