'Its a bit jumpy!'
Below that would be the word 'tick' or 'tock' alternating every second.
Under that is a coloured circle with a segment slowly increasing in size from 0 to 360 degrees.
On my browser, periodically there is a decided flicker.
So you aren't really missing much.
Because double-buffering is not used here, there is flicker.
Click on the link to download a zip file containing this web page, the java class file, and the java source file: Jump.zip - approx 2.9K.
