Being similar to z-fighting, this should be called attention-fighting: two or more elements need our attention while occupying the same space. That said, I rem

Being similar to z-fighting, this should be called attention-fighting: two or more elements need our attention while occupying the same space. That said, I remember about flashing character codes in old computers, invented before bold/underline text. Also the Internet of the 90s abused of blinking gif images.