Good Morning! well i have a year wihtout using pure data but now i need it and i have a simple project but it's taking me so much time. I need to play an audio file. when the audio is at 2:00minutes i need a timer start counting 1:30minutes in these minutes only in these 1:30 minutes there will be a bang if you click it then the original audio will stop and another will start. but if the time ends, you'll cant use the bang. D: sounds difficult now i read it

well, I admit I'm not shure I'm clear with that but in pd-extended there's an object called [clock] that is a clock and with the appropriate conversion in seconds and the [sel] object I think you can have what you need
cheers

Just use [delay] to open and close a [spigot].

[bng]
| [delay 2000] <--start this when audio starts
| / \
| [1( [delay 1500]
| | /
| | [0(
| | /
[spigot]

And, of course, if the [bng] is hit, stop the [delay 1500], close the [spigot], and start the [delay 2000] again.