postinstall.js

console.log(`
                             
██╗   ██╗██╗███╗   ██╗ ██████╗ 
╚██╗ ██╔╝██║████╗  ██║██╔════╝ 
 ╚████╔╝ ██║██╔██╗ ██║██║  ███╗
  ╚██╔╝  ██║██║╚██╗██║██║   ██║
   ██║   ██║██║ ╚████║╚██████╔╝
   ╚═╝   ╚═╝╚═╝  ╚═══╝ ╚═════╝ 

`)

console.log('use the following command to test:')

console.log('ying -v')