from machine import Pin, I2C
from ssd1306 import SSD1306_I2C

i2c_oled = I2C(scl=Pin(25), sda=Pin(26))

oled_w = 128
oled_h = 64

oled = SSD1306_I2C(oled_w, oled_h, i2c_oled)

oled.fill(0)
oled.pixel(20, 20, 1)

oled.pixel(50, 30, 1)
oled.pixel(50, 31, 1)
oled.pixel(51, 30, 1)
oled.pixel(51, 31, 1)
oled.show()