const unsigned int BUTTON_PIN = 7;
const unsigned int LED_PIN = 13;

void setup() {
    pinMode(LED_PIN, OUTPUT);
    pinMode(BUTTON_PIN, INPUT);
}

void loop() {
    const int BUTTON_STATE = digitalRead(BUTTON_PIN);

    if (BUTTON_STATE == HIGH) {
        digitalWrite(LED_PIN, HIGH);
    } else {
        digitalWrite(LED_PIN, LOW);
    }
}