def output_welcome():
    """print welcome information"""
    order = """                
                ,-----.           ,--.               
                '  .-.  ',--.--. ,-|  | ,---. ,--.--. 
                |  | |  ||  .--'' .-. || .-. :|  .--' 
                '  '-'  '|  |   \\ `-' |\\   --.|  |    
                `-----' `--'    `---'  `----'`--'    
                                                    
    """
    print(order)
    print('-' * 70)
    print('\nOrder: A tool to characterize the local structure of liquid water'
        )
    print('       by geometric order parameters\n')
