code: func (s *DisplayBuffer) Set(x, y, c int) {
  	idx := x + (y/ssd1306PageSize)*s.Width
  	bit := uint(y) % ssd1306PageSize
  
  	if c == 0 {
  		s.buffer[idx] &= ^(1 << bit)
  	} else {
  		s.buffer[idx] |= (1 << bit)
  	}
  }
docs: // Set sets the x, y pixel with c color