Making long loops

I need to take short non pitched loops, say 15 seconds and make them last 2-3 minutes. Currently, I’m copying and pasting on the end, taking that new segment and copy/paste, etc. How can I take an event and paste it butt up against the previous event?

If I use an arrangement track, how would I apply this to multiple tracks?



Thank you.

[alt]+drag the lower right corner of the event.