Liquid Timer

We do not see it counts the time, but see it is flipped up and down.

«liquid timer»

lake

grass

We read a person's heart precipitating awhile over here, then precipitating awhile over there.

We watch a person unconsciously stuffing its heart into a container, then unconsciously making the heart run around the container.

After the precipitating, the person's heart, just as same as a lake, may clearly carve out the surroundings.

After the turning over, the person's heart is like a lakeside grass blown up and down in the wind, but the lake is still a lake.

How on earth long is the heart road? it is very much long, just as the height of a liquid timer.