C guys will say it will spend many years to understand the meaning of pointer ->,I was feeling drunk in the idea of the story in the past days. And, one day night I dreamed of clock ,that white pointers cross and stand up together,d..d.the song through my head, I feel the meaning of time it has no shape,it doesn't exist in the three direction in our human world, in the four direction ,they have time point, our made just copy clock point from one to another one, long time ago, human could see the sun ,the day and night,the leaves grown and died,the life changing give the word of "time".Think about that it's amazing , just like "pointer" of computer science ,ha? ha