Trigger Automator folder action when content of a folder is removed

I want to trigger the automator folder action when I remove a file from a folder, is there a way to achieve this? The folder action works perfectly when I add something to it but not when I remove it. How can I achieve this? Thanks in advance! **Edit 1:** It is perhaps better if I give more details about what I want to achieve. I have a folder on the desktop and I want his color to change depending on whether it is full or empty. I have already a working shell code which works perfectly when I run it through terminal. Using that shell code with automator folder action works only when I put a new file inside the folder but not when I remove it.