Multi Switch: Turn on the lights

For this multi meter I decided to create an interactive logic game. The main goal is to find a way to have all the lights turned on at the same time. Each button has a set of conditionals that turn some of the LEDs on or off. The 3 LEDs receive their power from the Arduino, which also receives the input from the buttons when they are pressed. Through exploration or logic, the user can find a way to solve the puzzle while pressing the buttons in a specific order. This game can be expanded with many more lights, making it even harder to solve each time.

	const int yellowL = 8;
	const int greenL = 9;
	const int blueL = 10;
	const int b1 = 5;
	const int b2 = 6;
	const int b3 = 7;
	void setup() {
	// put your setup code here, to run once:
	pinMode(yellowL, OUTPUT);
	pinMode(greenL, OUTPUT);
	pinMode(blueL, OUTPUT);
	pinMode(b1, INPUT);
	pinMode(b2, INPUT);
	pinMode(b3, INPUT);
	Serial.begin(9600);
	digitalWrite(yellowL, LOW);
	digitalWrite(greenL, LOW);
	digitalWrite(blueL, LOW);
	}
	void loop() {
	// read the button state - 0 is pushed 1 is off
	int b1State = digitalRead(b1);
	int b2State = digitalRead(b2);
	int b3State = digitalRead(b3);
	int yellowState = digitalRead(yellowL);
	int greenState = digitalRead(greenL);
	int blueState = digitalRead(blueL);
	//Serial.println(b1State);
	//Serial.println(b2State);
	//Serial.println(b3State);
	//What buttons will do
	if(b1State == 0) {
	digitalWrite(yellowL, HIGH);
	digitalWrite(greenL, LOW);
	}
	if(b2State == 0) {
	digitalWrite(blueL, HIGH);
	digitalWrite(greenL, HIGH);
	digitalWrite(yellowL, LOW);
	}
	if(b3State == 0) {
	digitalWrite(greenL, HIGH);
	}
	//if blue light is on and b2 is pushed, blue light will turn off
	if(blueState == 1 && b2State == 0) {
	digitalWrite(blueL, LOW);
	}
	// Hit all 3 buttons at the same time to reset to all lights off
	if(b1State == 0 && b2State == 0 && b3State == 0){
	digitalWrite(yellowL, LOW);
	digitalWrite(greenL, LOW);
	digitalWrite(blueL, LOW);
	}
	//When all lights are lit send Success message
	if(yellowState == 1 && greenState == 1 && blueState == 1) {
	Serial.println("Success!");
	delay(300);
	digitalWrite(yellowL, LOW);
	digitalWrite(greenL, LOW);
	digitalWrite(blueL, LOW);
	delay(100);
	digitalWrite(yellowL, HIGH);
	digitalWrite(greenL, HIGH);
	digitalWrite(blueL, HIGH);
	delay(100);
	digitalWrite(yellowL, LOW);
	digitalWrite(greenL, LOW);
	digitalWrite(blueL, LOW);
	delay(100);
	digitalWrite(yellowL, HIGH);
	digitalWrite(greenL, HIGH);
	digitalWrite(blueL, HIGH);
	delay(100);
	digitalWrite(yellowL, LOW);
	digitalWrite(greenL, LOW);
	digitalWrite(blueL, LOW);
	delay(100);
	digitalWrite(yellowL, HIGH);
	digitalWrite(greenL, HIGH);
	digitalWrite(blueL, HIGH);
	delay(100);
	digitalWrite(yellowL, LOW);
	digitalWrite(greenL, LOW);
	digitalWrite(blueL, LOW);
	delay(100);
	digitalWrite(yellowL, HIGH);
	digitalWrite(greenL, HIGH);
	digitalWrite(blueL, HIGH);
	delay(100);
	digitalWrite(yellowL, LOW);
	digitalWrite(greenL, LOW);
	digitalWrite(blueL, LOW);
	delay(100);
	digitalWrite(yellowL, HIGH);
	digitalWrite(greenL, HIGH);
	digitalWrite(blueL, HIGH);
	delay(100);
	digitalWrite(yellowL, LOW);
	digitalWrite(greenL, LOW);
	digitalWrite(blueL, LOW);
	}
	}

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