The Navajo Origin Legend

I did not understand this story that well and resulting from that, I found it to be weird. I know that the colors each represent something more than wind but I can't seem to put my mind to it. The only thing I can seem to elaborate on is " the wind that gave them life, is the wind that comes out of our mouths now that give us life" I'm confused on this sentence but if I were to relate the wind to something, it would be oxygen. If there was no oxygen we wouldn't be able to breathe which would result in death. And this "wind" seems to have created the first man and woman. This is similar to the story of creation, however, God created us through dirt. I don't know how else to elaborate on this story, but this is what I got from the text.