Python/NodeJS offline crypto generator aka cold wallet

Create offline script (python or nodejs) which generates *cold address from randomly generated seed phrase. *Cold address means address created in offline mode (w/o internet connection or any other online stuff).

For example: 'nestles clefts clefts eagerly squired squired seaward anyplace anyway piked soggiest soggy' generates 'APL-SJRR-8UT4-MLK5-DBUHW'
Final output format: phrase:address in console.
For more information see source code https://github.com/ApolloFoundation/Apollo-web-ui