On timer not working

The same code works fine for me. Are there multiple instances of Disparo sprite? Or maybe it gets destroyed while the timer is running. Or some other events are interfering. If this doesn't help, consider posting your project file.

IIRC triggers don't necessarily follow the top to bottom flow of the event sheet. There is a possibility that the trigger for the timer ending might happen before the every tick event, setting the variable to 0, and then back to one in the same tick.

Your Disparo sprite is destroyed by Fade behavior before On timer event is triggered.

You can easily resolve issues like this yourself if you run the project in Debug Mode!