Calligraphy works for grandparents. What should I write?

4. Old age

It's dusk,

Look at the end of the world by the fence.

Tianya Road:

When the sun goes down,

River of no return.

Moving like running water, still like jade,

God suggested that I live in the sky.

Living in the sky:

A dream in Yaotai,

Very insightful.