How to Add a time stamp?

I have these conditions that if it is there on M5, I set it to hit a switch. Then when M1 hits the same conditions, a popup alert will come out with a sound.

How do I code it that the indicator takes down the time M5 hit the conditions, and if possible how do I add 30 minutes to that? (and display that on the popup)

I'm new to coding thanks so much guys :)