In the heydays of the web hosting service GeoCities (1990s-2000s), this little critter, a simple tabby cat chasing an insect, was a staple GIF on many of its sites. Sadly the sleepy and active kitty never made the jump to Web 2.0, but is an important footnote in the history of the GIF as a decoration piece.
Credits: John Wong’s Cyber Castle of MatheLogical Ascertainment of Events 黃仲佳先生的「數學鑑證」及「事件偵察」資訊科技城 via GifCities and Internet Archive