Here's what you do. Take a picture, any picture with vibrant colors and make a gif that will play tricks on your eyes to make a colored image where there is none.
Step 1: Open up photoshop or Gimp (which is what this tutorial was written for), open your image, and draw a dot in the center.
Step 2: Make a duplicate of your image and convert it to Greyscale. Follow that by converting it to RGB again. It should now be a black/grey/white image.
Step 3: take the original image and invert the colors.
Step 4: go to the grey image and create a new layer.
Step 5: copy all of the inverted colored image and paste it on top of the layer you created on the grey image.
Step 6: You should now have 2 layers, the bottom a greyscaled image of the original and the top an inverted version of teh original.
Step 7: Now index your image as you always would with a .gif
Step 8: Save your image as <yourname>.gif and save the layers as an animation. Select one frame per layer and set the frame time to 10000 milliseconds or 10 seconds.
Step 9: Make sure it works and post it up here!
Here's one that I made:
Stare at the dot as it goes through it's frames. Surprise!