Move all files from sub folders to parent

Hi there,

This seems a common enough question, but my issue is that I have zero experience of using either scripts or Automator.

I'm moving files from iPhoto and want to change the structure. Presently i've sorted into year groups and then have multiple (hundreds) of sub-folders under that e.g.

- 2017

- Date 1

- File 1

- Date 2

- File 2

- Date 3

- File 3

I want to move all files into the '2017' folder.

Im hoping some wonderful person on the forum can advise how i can setup a script and run it properly. Sorry i'll probably need step by step instruction, but you'll save me probably a day of my life! I have a year for each folder back to 2005!!

Thanks in advance for any assistance,

SuperTrooper