Simple time counter (90s)

timeCounter.ino

#include <SPI.h>
#include <Adafruit_GFX.h>
#include <Adafruit_PCD8544.h>

Adafruit_PCD8544 display = Adafruit_PCD8544(7, 6, 5, 4, 3);

int LED_PIN = 8;
int INP = 2;

int counter = 0;

boolean lcdStarted = false;

void setup() {
  Serial.begin(9600);
  
  display.begin();
  display.setContrast(50);
  display.clearDisplay();
  display.display();
  
  pinMode(LED_PIN, OUTPUT);
  
  display.clearDisplay();
  display.setTextColor(BLACK);
  display.setCursor(0,0);
  display.display();

  Reset();
}

void Reset() {
  counter = 91;
  display.setTextSize(7);
  Light(true);
  Clock();
}

void Light(boolean on) {
  if (on) {
    digitalWrite(LED_PIN, HIGH);
  } else {
    digitalWrite(LED_PIN, LOW);
  }
}

void Draw(int text) {
  display.clearDisplay();
  if (text >= 10) {
    display.println(text, DEC);
  } else {
    display.println("0" + String(text));
  }

  if (text <= 10) {
    if (text % 2 == 0 && text > 0) {
      Light(false);
    } else {
      Light(true);
    }
  }

  display.display();
}

void Clock() {
  counter = counter - 1;
  if (counter >= 0) {
    Draw(counter);
    delay(1000);
    Clock();
  } else {
    display.clearDisplay();
    display.setTextSize(2);
    display.println("TIME UP");
    display.display();
    delay(1000);
    Light(false);
  }
}

void loop() {
  if (counter <= 0) {
    if (digitalRead(INP) == LOW) {
      Reset();
    }
  }
}