How to pronounce “flashing”(noun) in English

When it's excessive, that little flashing signal in your brain like, oh, call your mother, doesn't shut off.

Because you see, if you have one of those red flashing lights as you find sometimes on the highways, very aggressively flashing red lights, and it's right in front of your eyes,

I was this little kid wondering what in the world those lights were doing, what the flashing was.

What happened was a bunch of young US airmen saw some flashing lights out through the trees.

fit a UNIVAC on set next to Walter Cronkite, so they built like a Star Trek version of it with just some flashing lights next to him.