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

#define PANTALLA_ANCHO 128
#define PANTALLA_ALTO 64
#define OLED_RESET    -1
Adafruit_SSD1306 display(PANTALLA_ANCHO, PANTALLA_ALTO, &Wire, OLED_RESET);

void setup() {
    if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
        for (;;);
    }
    display.clearDisplay();
    
    display.fillCircle(20, 20, 10, WHITE); //con relleno
   display.fillCircle(20, 45, 10, WHITE);
    display.drawCircle(100, 30, 5, WHITE); //sin relleno
    display.drawCircle(100, 30, 15, WHITE);
    display.drawCircle(100, 30, 25, WHITE);
    
    display.display();
}

void loop() {
}