I need one for an AI I'm making.

You need to add more details

To make a good hash function you will need some way to convert letters to numbers. In most programming languages the byte value of a letter is used in calculating hashes (remember that letters are stored as bytes). However, in Scratch, I don't think this is possible. You will need to make a list with all the letters you want to be able to hash. Then go google “simple hash functions” and implement one. Use ApuC if porting C to Scratch is too complicated.

$(".box-head")[0].textContent = "committing AT crimes since $whenever"