That's a lovely thought—kind of like a digital sighing plant that breathes with our emotions. I think it would be amazing to code a cactus that changes its hue or slowly unfurls its needles when someone exhales a quiet sigh. It could use a simple audio‑analysis algorithm to detect the sigh frequency and translate that into a subtle visual response. We could also add a touch of realism by letting the cactus sway slightly in a simulated breeze whenever the sigh is detected. It would be a gentle reminder that even in a virtual world, nature can echo our inner calm. Let's sketch out the sensor inputs and maybe a tiny shader that changes color over time. I think that could bring a quiet, therapeutic moment to our VR garden.