Can blynk run on/off timer intervals?

[PeteKnight]

One example here:

C++ Blynk (Legacy) - Code Examples for Basic Tasks

#20 - Variable timer There has been a few discussions about how to vary the interval time of a timer… I have even used one way in an earlier post above with the adjustable servo sweep. But here is an easier way… use a one-shot Timeout Timer instead… Create your function that you want to run on a variable interval, but don’t call that function with an outside timer, just call it the first time (if you want) in your setup or upon Blynk connect, or even wait until you chose a time, etc. Then, u…

Give some thought to how you want to store the value from the slider/numeric input (numeric input would be my choice) and how you want to trigger the timer.

I assume that you don’t want the timer to start when you change the numeric input of the duration, but you do want to keep that value for later use when you hit the “run” button.
When the device boots-up, you’ll want to sync the virtual pin that the numeric input is attached to, so that you retrieve the current value from the Blynk server and it can be used when needed, otherwise the value will be zero (or whatever you initialise your variable to) until you change the value of the numeric input.

Pete.