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

const int screen_width = 128;
const int screen_height = 64;
const int address = 60;
Adafruit_SSD1306 screen(screen_width,screen_height, &Wire, -1);

void setup() {
screen.begin(SSD1306_SWITCHCAPVCC,address);
screen
}
int x = 10;
int y = 10;
void loop() {
screen.fillRect(screen_width/2-x/2,screen_height/2-y/2,x,y,1);
x++;
y++;
screen.clearDisplay();
}