BASH: how can the terminal be set to flash?
I want to get a BASH terminal flashing. The goal is to get the terminal to flash between two colours, say white and black, substantially, using standard Linux utilities. I don't mind if the terminal is filled with characters and cleared in order to do this. A rough picture of what this could look like is as follows: 
Solution
You can toggle between normal and reverse video with the following shell commands:
printf '\e[?5h' # Turn on reverse video
printf '\e[?5l' # Turn on normal video
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