Removing game objects after timer

I have a timer spawning objects across the screen at random positions and they stay on the screen after more objects are scored. My question is how do I make the game objects disappear after a certain amount of time and have that count against you for the game? Also would I need to create more timers to get more varying timing differentials so not all of the objects spawn exactly the same time apart? Is it using a table to get them to spawn one after the other? Or simply using timer.performwithDelay? or Killing an object?

Also how do I make them an object to touch or tap them? To where when you tap them, an action happens?

You’re asking some very basic questions that would be answered by going through sample code, reading tutorials or viewing video tutorials.

A great place to start is:  https://coronalabs.com/resources/tutorials/getting-started-with-corona/

Look at touch/tap events and timers.

Rob

Also how do I make them an object to touch or tap them? To where when you tap them, an action happens?

You’re asking some very basic questions that would be answered by going through sample code, reading tutorials or viewing video tutorials.

A great place to start is:  https://coronalabs.com/resources/tutorials/getting-started-with-corona/

Look at touch/tap events and timers.

Rob