plane_charter_1b
Focus on the flashing green dot in the center and notice that some or all of the yellow dots will disappear.
The longer you stare, the better it works. The arrows speed up or slow down the spinning.
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Focus on the flashing green dot in the center and notice that some or all of the yellow dots will disappear.
The longer you stare, the better it works. The arrows speed up or slow down the spinning.