Snapbuzz_official on Instagram: "- The post features a 13-second video of hands manipulating a framed op art spiral that shifts from black-and-white to red stripes, creating an illusory rotation effect through tilting and lighting. - This piece echoes 1960s Op Art, a movement by artists like Bridget Riley that exploits contrast and geometry to mimic motion, as noted in viewer replies referencing its era. - Neurologically, such spirals trigger illusory motion via the brain's V5 area, per a 2010 S