On variable changed trigger
On variable changed - Trigger whenever the chosen variable changes value.
Triggers. Hope you can explain that to beginners (and to me). Triggers are tricky when displaced in time, order or depth.
What you propose is worse, it is a beast that has to be caged behind several doors, behind so many exceptions ... that it cant be used.
Say, i do this.
Global variable 'a'
Instance variable 'b'
On variable changed 'a'
...... set Instance variable 'b' to random(0,101)
On variable changed 'b'
...... set global variable 'a' to random(b,a)
On object clicked
...... add 1 to Instance variable 'b'