How do I block Enemy attack?

Hello Everyone

I work on my Idle RPG game, hero walking around the map and is defeating his enemies, but there is a certain blockage that I cannot overcome.

This is function of enemy attack player, after all attacks there is global value (ROLL) from 1-100.

I want create Block System, so if value Roll is lesser or equal 25, this function "enemy attack player" is turn off, thats mean hit is block and player dont get damage.

Any sugestion :)??

You will of course need to do the roll before, not at the end. Create a sub event (press S) and run the roll. Then create a sub event again and say if roll > 25 perform those actions.