This really is clever, Michael. Every line has clearly been thought carefully about, including that 'sneaky fourth line', the title.
The personification of the flag and how you have it dancing rather than merely flapping or some such boring word is marvellous. And the idea that it is the flag with its proud colour(s) that can actually help save life is a joy. The red in it actually meaning 'life', of course. Is it just me, or is that piece of cloth beginning to flutter on a mere breeze now rather than needing a storm to raise its colours?
By the way, 'it's' there is possessive so it doesn't need the apostrophe. That's the one word we don't use it with because that makes it a contraction of 'it is' or 'it has'. All these years homeschooling has taught me something at least...

Excellent work, truly. Nominated.

My eyesight too is on the wane. I now wear reading glasses which allows me to fool everyone into thinking I am moderately intellectual.

Love your syntuits and how each line has even more meaning! Such phenomenal news too, a definite step ahead.

I've wondered for a while what it would take for governments to come to their senses and realise blood can save a life no matter who donates it. Maybe covid has done just that.

I absolutely love this and you!!!.well done xx

I love this message! It's been in my favourites ever since you posted it, but only now have I thought to post a decent comment, lol
It's such a terrible thing that up until recently - in this day and age - that not everyone could donate blood, purely because of something as inconsequential and harmless as having your own emotions. At MA said in her comment, this is a real step forward in equal rights.
I like how you've picked out the red in the pride flag, as it mirrors blood, and the same goes for the title ( the ' sneaky fourth line ' ). Putting so much, so cleverly in just three ( or four, considering the title ) lines is really wonderful.
Anyway, aside from my ranting and ravings, glad you posted this, and that it happened in the first place!

I like this a lot!