Clouds.

Playing hide 'n seek with the sun.

Now you see it, now you don't,

 then it’s back again.

Clouds.

Puffy pillows of white and grey

Drifting silently in a sky of brightest blue.

So tall, so majestic, so mystical.

Clouds.

A sign of rain to come.

 Or snow or wind or light or shade.

Or swords of lightning that slash the ground.