[asterisk-users] Time counting down and # detect

[Pham Quy]

Hi all, 

Here is the script  i want to make

- Caller call to a number to record a message
- Asterisk answer and start recording message as following
	+ User press * to start recording
	+ Record is finished if:
		+ User press #
		+ OR message duration reach 60 second
	+ Hangup

How do you counting down 60s, and how to detect # (i make a test using
Read() but it cant read #)

Thanks in advance
Quyps