The pictures are non-animated pictures.
They are related to your pressure level.
If you see them move, then that means you have pressure currently.
The speed of the moving is the level of your pressure.
The higher that moving speed, the higher pressure you have.
Most children and old men only see the pictures are not moving and keep still.

Test yourself regularly with these pictures to know yourself better.
Sometimes, it is good to have a appropriate pressure to push us to do better,
but too much  pressure  can cause us to the end of the edge.
Be relax when you know you have too much pressure inside!

If you see them NOT moving?..… I ENVY YOU!!!  Arrghh….