#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define OLED_RESET    -1  // Reset pin (or -1 if sharing Arduino reset pin)

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

void open_eyes(void) {

  for (int a = 21, b = 31, c = 21; a >= 2 && b <= 51 && c >= 2;  b += 1, a -= 1, c -= 1)
  {
    display.clearDisplay();
    display.fillRect(71, 8, 33, 42, 0xFFFF);
    display.fillRect(23, 8, 33, 42, 0xFFFF);
    display.fillRect(23, b, 33, a, 0x0);
    display.fillRect(23, 8, 33, c, 0x0);
    display.fillRect(71, b, 33, a, 0x0);
    display.fillRect(71, 8, 33, c, 0x0);
    delay(2);
    display.display();
  }

}

void close_eyes(void) {

  for (int a = 2, b = 51, c = 2; a <= 21 && b >= 31 && c <= 21;  b -= 1, a += 1, c += 1)
  {
    display.clearDisplay();
    display.fillRect(71, 8, 33, 42, 0xFFFF);
    display.fillRect(23, 8, 33, 42, 0xFFFF);
    display.fillRect(23, b, 33, a, 0x0);
    display.fillRect(23, 8, 33, c, 0x0);
    display.fillRect(71, b, 33, a, 0x0);
    display.fillRect(71, 8, 33, c, 0x0);
    delay(2);
    display.display();
  }

}


void intro(void) {
    display.clearDisplay();
    display.setTextSize(1);
    display.setTextColor(SSD1306_WHITE);
    display.setCursor(32, 18);
    display.print("Temperature");
    display.setCursor(37, 33);
    display.print("Indicator");
    delay(2000);
    display.display();
}



void setup() {
  // Initialize the display
  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { // Address 0x3C for 128x64
    Serial.println(F("SSD1306 allocation failed"));
    for(;;); // Don't proceed, loop forever
  }
  display.clearDisplay();
}

void loop() {

  intro();
  delay(1000);
  open_eyes();
  delay(5);
  close_eyes();
  delay(5);
}