1. Go to
Code:

http://www.google.com

2. Click "images"
3. Fill in "bikes, flowers, cars" or any other word.
4. You will get a page with alot of images thumbnailed.
5. Now delete the URL on the addressbar (example:
Code:

http://images.google.nl/images?hl=nl&q=flowers&btnG=Afbeeldingen+zoeken&gbv=2

)
6. Copy the script down here, and paste it in your adressbar :D!

Code:

javascript:R= 0; x1=.1; y1=.05; x2=.25; y2=.24; x3=1.6; y3=.24; x4=300; y4=200; x5=300; y5=200