import machine
import ssd1306
from ssd1306 import SSD1306_I2C

sda=machine.Pin(21)
scl=machine.Pin(22)
i2c=machine.I2C(0,sda=sda, scl=scl, freq=400000)
oled = SSD1306_I2C(128, 64, i2c)
oled.fill(0)
oled.text("Hello World!", 0, 0)
oled.show()
print('Done')