Update README.md

README.md

@@ -13,6 +13,8 @@ If you ever use this code please cite me  :pray:  :heart:
 
 If you need to contact my you could write me at *[email protected]* or *[email protected]* .
 
+[![](https://www.paypalobjects.com/en_US/i/btn/btn_donateCC_LG.gif)](https://paypal.me/AlbertoZancanaro?locale.x=it_IT)
+
 ##
 **NB: THE PROJECT TO WORK NEED SOME FILE THAT I CAN'T UPLOAD ON GITHUB FOR SIZE REASONS.**
 The file are available at the following [link](https://drive.google.com/file/d/1doIFMfhjTz7fKd_B_HhHGWr5agNh242I/view?usp=sharing) . Download them an put the in the path specify by the file path extra thing.txt