def banner(str, color: GREEN)
      now = Time.new.strftime("%H:%M:%S")
      s = "#{str} ".ljust(72, " ")
      $stderr.puts "#{color}[#{now}] #{s}#{RESET}"
    end
def banner(str, color: GREEN)
      now = Time.new.strftime("%H:%M:%S")
      s = "#{str} ".ljust(72, " ")
      $stderr.puts "#{color}[#{now}] #{s}#{RESET}"
    end
Print a colored banner to $stderr in green.