Being a bit older, married and (now) a bit overweight, I minimize the stride that causes it to "flash" red and grab the ladies' eyes.
I’m thinking a flash of white from striding forward with the right leg, and a flash of red from the left foot stride, from a field of blue. that would be my “American” pattern.
For the Undead Thread, I think we’d need something ... different.
I wonder just how close to the appearance of a spreading flame front we could get with the flash appearance of a rank of marching warriors?