🌡️ Thermostat Automaton

• States: {OFF, ON}
• Transitions: OFF→ON when T < lower (cooler's ideal)
  ON→OFF when T > upper (warmer's ideal)

function applyTransitions() {
    const lower = getLowerThreshold(); // cooler's ideal
    const upper = getUpperThreshold(); // warmer's ideal

    if (heaterState === "OFF" && temperature < lower) {
        heaterState = "ON";
    } else if (heaterState === "ON" && temperature > upper) {
        heaterState = "OFF";
    }
}

function updateTemperature(dtSec) {
    let rate = (heaterState === "OFF") ? -0.1 * temperature : 0.2;
    temperature += rate * dtSec;
}