On a signal all students flip to the first color and then count to two, then flip again. An animated pattern usually consists of four different pictures.
開始時如前面說的辦法一樣，是遵照老師的指揮旗，翻出第一圖，然後在心裡默數一二，再繼續翻出下一個顏色，如此四個圖案連續出現，動態的感覺就表現出來了。