# A ajouter au code du §2.1
# ligne horizontale : hline(pos_x1,pos_y1,pos_x2,pos_y2,c)
# ligne verticale : vline(pos_x1,pos_y1,pos_x2,pos_y2,c)
# c=0=>noir, c=1=>blanc

oled.hline(0,0,oled_width-1,1) 
oled.hline(0,oled_height-1,oled_width-1,1)
oled.vline(0,0,oled_height,1)
oled.vline(oled_width-1,0,oled_height,1)
oled.show()

time.sleep(3)