2-condition trigger issue

What an education! Thank you for responding...your logic makes sense and clearly there is more than one way to do this. I appreciate you showing me a few of them.

Here’s another solution just to show you there are often several ways to work with triggers, conditions and variables to achieve your goal. Your conditions were fine, the problem is the event. The trigger reads, change state of fire extinguisher to normal when timer changes, if timer == 120 AND temperature == 450 (else Hidden). SL only evaluates conditions at the instant the event fires, nothing continuously watches variables. So if the slider’s already at 120 and you then dial the temperature to 450, no event fires and the extinguisher stays hidden. Same on the way out, drop the temperature and it stays visible until the timer moves. That’s the timer-dependence you were seeing. The standard pattern for AND conditions across two variables is one trigger per variable, identical conditions on each.

It won't work if you set the Timer to 120 first and then set the Temperature to 450 degrees, because the fire extinguisher's state is evaluated only when the Timer variable changes, not when the Temperature variable changes.

To resolve this, add an additional trigger that changes the fire extinguisher's state to Normal when the Temperature (dial) changes, using the same conditions. This ensures the state is evaluated whenever either variable changes, regardless of the order in which the user adjusts them.

Current trigger:

Additional trigger:

If you're a fan of JavaScript, you can implement this interaction with a single trigger. Simply add an Execute JavaScript trigger that runs when the timeline starts:

const fireextinguisher = document.querySelector('[data-model-id="6mukAbVtlHP"]');

setInterval(() => {
    const timer = getVar('Timer');
    const temperature = getVar('temperature');

    if (temperature === 450 && timer === 120) {
        fireextinguisher.classList.remove('hidden');
    } else {
        fireextinguisher.classList.add('hidden');
    }
}, 100);

Both implementations are included in the attached Storyline project file.

that is a far better approach than the one I'd tried. I like that you introduced another T/F variable as another connector TO  temp and time values.

Very elegant method. Thank you!