>> Playing Welcome Audio

 >> Ask User to say on mic one of following (today - open - close - exit)

 >> if user say today :
    date audio wiil be played and date of day will printed

 >> if user say open :
    led will turn on and open audio will be played

 >> if user say close :
    led will turn off and close audio will be played     

 >> if user say exit :
    exit from all the program and exit audio will be played