How to use "waving" in a sentence

A large crowd followed behind, waving flags and carrying swords and heavy sticks

They watched as the fish moved slowly between the waving ocean plants, silent and peaceful in their watery world.

you're still going to do this?" she demanded, waving her hand toward the pod center.

I had just finished cutting some meat, which was very tough, and said, waving the knife in a way that was not at all appropriate for a vicar, that anyone who murdered Colonel Protheroe would be doing the world a favour.

And then, coming from the direction of Horsell, I noticed a little black group of men, the first of whom was waving a white flag