Bip39 Github. Entropy values need to be sourced from a strong supply of randomness. This suggests flipping a good coin, rolling a good dice, sounds measurements etc. Do NOT use phrases from books, lyrics from songs, your birthday or steet address, keyboard mashing, or something you think is random, mainly https://directory4web.com/listings13022243/bip39-mnemonic-generator-https-linktr-ee-bip39-bip39-mnemonic-generator-fundamentals-explained