Tê Timer: How to Make Your Own Timer

It's like we put time into a container to exam it by an action, as a result, we make a timer. Once I was told if I walk from the station to my friend's house, it would take shuffling three songs in my ipod. Or I'll know how long does it pass when one sugar cube has melted completely. We hear tic-tac. We make tea. We wait for film to be developed. We see leaves fallen from the tree. And eventually, we all grow a timer in our own body....