More color, eh? Okay, let's try this: The Sun's spectrum radiating out from the Sun is added. Please Register or Log in to view the hidden image!
Create a bezier patch with your favorite 3D renderer. Assign the proper Sine equation to the control points. Apply an image map of your flag design onto the bezier patch. Vary the phase over a number of renderings. Assemble the separate renderings into a animated GIF.
How else? With the power of MAGIC!!! Heh. Nah. I was talking to Janus. Forgot to paste the quote in. Fixed it before you even posted... Of course. You could always follow this simple advice: You'd need to alter the recipe somewhat though. So the pole would wave rather than the flag.
But doing that would make future colonies on other planets think that they are equal to their mother-planet: Earth. Please Register or Log in to view the hidden image! Besides, the thread specifies an Earth flag. Thus, this: Please Register or Log in to view the hidden image! should be the flag. The Earthen Eagle (represent the human spirit and will to soar above our previous potential) clutching the globe (representing earth, and the will for humanity to make earth more glorious by expanding our planet's domains beyond the skies), on a white misty field (representing clouds, or the sky that the eagle is lifting us beyond). The letters are there because I forgot to edit them out before putting it on photobucket.
Recently, I've been studying vexillography (or flag-designing), and I thought I should point you to NAVA (the North American Vexillogical Association). http://www.nava.org/ I'd recommend that you take a look at their guides to designing a good flag: "Good Flag, Bad Flag" and "A Flag for New Milford". Basic rules: 1. Keep It Simple The flag should be so simple that a child can draw it from memory… 2. Use Meaningful Symbolism The flag’s images, colors, or patterns should relate to what it symbolizes… 3. Use 2–3 Basic Colors Limit the number of colors on the flag to three, which contrast well and come from the standard color set… 4. No Lettering or Seals Never use writing of any kind or an organization’s seal… 5. Be Distinctive or Be Related Avoid duplicating other flags, but use similarities to show connections… Learning good flag design can make the difference between Denver's flag: Please Register or Log in to view the hidden image! ^_^ and Pocatello's: Please Register or Log in to view the hidden image! O_O And I might as well show you the flag I've been designing recently...it's not for Earth as a whole, but rather a scientific community in my imagination: Please Register or Log in to view the hidden image! The dark blue background represents the night sky and the many mysteries to be discovered. The white flask represents science in its experimental stages, and the surrounding gear represents both practical science and the sun (the spread of knowledge to the world). The proportions of the flag are that of the Golden Ratio.