挑战你的视觉 开动你的脑筋

Moving Circle

Look at this illusion for a while and it will appear to be shimmering and moving.

Also: Follow the outermost groove and watch it change from a groove to a hump as you go around the wheel.

移动圆环

盯着这个图像看一会儿，你会发现这个圆环正在发光转动。盯着外圈的凹槽看一会儿，你会发现它逐渐变成突起的了。