Как написать поздравление на Java Script?

function happy(str) {
    let args = [];

    args.push(`%c %c %c ${str} `);
    args.push(`background: #1b5e20; line-height: 26px;`);
    args.push(`background: #1b5e20; line-height: 26px;`);
    args.push(`background: #2e7d32; line-height: 26px; color: #fefefe;`);

    window.console.log.apply(console, args);
  }

  happy("Happy birthday, Kevin!");