I want to take some photos about the theme of time recently. Please help me think about what can reflect the passage of time ~

1 You (don't write "you", I don't know how to describe O(∩_∩)O) Great-grandfathers and great-grandmothers pat the back of your young father, and in a blink of an eye, your old father is close to the back of your young children, or turn people into trees. The sun went down, and a man was running, trying to catch up, but he couldn't. The wild flowers on the mountain withered when the wind blew, except one. Can you have a look? O(∩_∩)O is purely a personal imagination. Please don't mind if there is something unreasonable.