How do I check if a hero isn't see by all the ennemies

Hi folks,

Let's say I have a game with a hero, and multiples ennemies with the line of sight behavior. I want to trigger an event when all the ennemies can't see the hero. All of them.

Is there an easy way to achieve that ?

There must be an easier way but..

system every tick - set Globalvariable = enemy.count

for each enemy

enemy has not line of sight - subtract 1 from GlobalVariable

system compare two values - GlobalVariable = 0

add action

Thank you very much. It works fine !