Can I change only parent object's state?

Hello, I want to change the parent object state (actually I want to add a blink function).
However, the child objects blink together. I want only the parent object to blink.
Why is this happening?
and How solve it? Thank you guys.

This is my code:

Pressing the esc key initiates ‘blink function’.

This may be for you:

1 Like

thank you so much.