How do I make smooth rotation?

Hello all! I was wondering how to make an object smoothly rotate to a angle/position in a single trigger. When i say single trigger I mean events such as "On created" that only set off its corresponding actions once, as opposed to something like "Every Tick"

In other words, I want to make a function that can best be described as smoothely roatating until an objects angle or the position its facing meets a specified value

I used a instance var to control if will rotate or not

you can choose the +10 to change the rotation speed(put a "-" instead of "+" to rotate in counter-clockwise)

Use tweens.

construct.net/en/make-games/manuals/construct-3/behavior-reference/tween

Thank you to all who responded with advice, I think ill use Arisu51 idea of using an instance var