指导教师
提示词
一个指尖陀螺，有四层，从上往下：第一层是圆盘，上面有十字和闪电符号，第二层是一个带刺的齿轮，第三层是一个圆盘，第四层是一个有八个齿的转盘。整体是黑色。
A fidget spinner with four layers, from top to bottom: the first layer is a disc with a cross and lightning symbols on it; the second layer is a spiked gear; the third layer is a disc; the fourth layer is a wheel with eight teeth. The whole thing is black.
宽高比：1:1