Run command every second in Bash?

Question

I want to write some image downloader and assign it on bash. What I have and what I need:

I have:

1. Command, which works fine (something like wget

Answer 1

The command watch will do this for you straight up. It also displays the result in a nice way.

$ watch -n 1 date

Substitute date for your command. The -n option specifies the interval in seconds.