Toggle between two states based on variable

If you only want a blinking effect, why would you need that variable at all? I offered a two-line while loop which is toggling between two states of a multistate object. 

You seem to have some misunderstanding about advanced actions. You have an action with 3 decisions. The While loop will be executed only once, if the variable has the value 1, not at all if it is 0. To have a n eternal loop you need the condition "IF 1 is equal to 1'.  But that wouldn't solve your problem because all decisions are executed in sequence from top to bottom and from left to right. That means that the state will never change, whether the While condition was done or not, since the third decision is overriding the second one: Go to Next State followed by Go to Previous State is the same as doing nothing.

Blinking is something that happens in the time. In the action I showed in a previous answer I used the delay of 0,1secs. The multistate object had only two states. Go to Next State is looping automatically.

Here is a snapshot of the advanced action:

Maybe I'm oversimplifying this, but the loop here does what you describe.

Just a thought about the technique you are trying to achieve - if you are required to make the content ADA compliant - flashing or blinking objects are not really supported by accessibility standards.

Can you please post a Preview of the used advanced action? I want to see how you set up the While loop.

It would be helpful if you show a screenshot of your action - please click the Preview icon above the action name to make it easier to see the whole action.