Small Vertical Extension for Desk

In these hot days, a small fan to put on the desk is a panacea, but if like me you have little space available it is difficult to find a place for everything.
I thought of a solution to make everything fit without sacrificing aesthetics and functionality.
In addition to the side legs you will also need to equip yourself with a wooden shelf, in my case purchased from Ikea, but something else will do. In the case of large lengths I suggest to print also the leg without wall to be positioned in the center using double-sided adhesive tape as fixing.