diff --git a/ValveController.cpp b/ValveController.cpp
index 4fbf3ad..38d07c9 100644
--- a/ValveController.cpp
+++ b/ValveController.cpp
@@ -30,8 +30,8 @@ public:
 		, end_pin(gpio_end) {
 		gpio_init_out(motor1);
 		gpio_init_out(motor2);
-		gpio_init(start_pin);
-		gpio_init(end_pin);
+		gpio_init_input(start_pin);
+		gpio_init_input(end_pin);
 		start_time = std::chrono::steady_clock::now();
 	}
 
@@ -56,11 +56,11 @@ public:
 	}
 
 	State process() {
-		if (state == State::Opening && gpio_get(start_pin) == 0) {
+		if ((state == State::Opening) && (gpio_get(start_pin) == 0)) {
 			gpio_put(motor1, 0);
 			state = State::Opened;
 		}
-		if (state == State::Closing && gpio_get(end_pin) == 0) {
+		if ((state == State::Closing) && (gpio_get(end_pin) == 0)) {
 			gpio_put(motor2, 0);
 			state = State::Closed;
 		}
@@ -95,7 +95,7 @@ int main() {
 	gpio_init_input(button_open);
 	gpio_init_input(button_close);
 
-	const int tick_ms = 500;
+	const int tick_ms = 50;
 	while (true) {
 		if (gpio_get(button_open) == 0) {
 			cold_valve.open();
@@ -105,12 +105,14 @@ int main() {
 			cold_valve.close();
 			hot_valve.close();
 		}
-		gpio_put(PICO_DEFAULT_LED_PIN, 1);
-		sleep_ms(tick_ms / 2);
-		cold_valve.process();
+		sleep_ms(tick_ms);
+		const auto cst = cold_valve.process();
 		hot_valve.process();
-		gpio_put(PICO_DEFAULT_LED_PIN, 0);
-		sleep_ms(tick_ms / 2);
+		if (cst == Valve::State::Opened || cst == Valve::State::Closed) {
+			gpio_put(PICO_DEFAULT_LED_PIN, 1);
+		} else {
+			gpio_put(PICO_DEFAULT_LED_PIN, 0);
+		}
 	}
 	return 0;
 }