How to blink next button of storyline player when the timeline end of the slide.

I think I understand what you are telling me. 

ad1: when I delete the hide trigger and use the slide option instead, it does not work "the blinking layer"

Ad2: I have not tryed with 2 layers. But that will be the next. 

Ad3: please find a simple slide of my project. I think, that what i want is very simple. 

When you come to a slide you need to go through the literature before you can select the next button, and when you have visited all interactions then the next button should start flashing. 

I have cracked the flash button, but not the "if visited". 

If I delete the "if Visited or selected" then the flash button work at en of time line, but I need to have the student to visit the interaction before that happens. 

Thanks for your answer, I hope you can help me in my problem. I will attach my slides, perhaps you can find out why it does not flash when all interaction has been visited. 

/Jesper