QB Shift Logic Pseudocode

if pixels_to_move > 1:
	bytes_to_move = pixels_to_move // 2	#integer division operator
	pixels_to_move -= 2 * bytes_to_move
	for y in range(16):
		pos = (0x80*y) + 0x40
		filedata[pos:pos+8] = filedata[pos + bytes_to_move:8-bytes_to_move] + b'\x00' * bytes_to_move	#Easy, right?
if pixels_to_move == 1:
	for y in range(16):
		pos = (0x80*y) + 0x40
		for x in range(7):
			filedata[pos] = filedata[pos] << 4 + filedata[pos+1] >> 4 	#Easy, right?
			#If you're having trouble, it shifts the current byte left 4 and adds the most significant 4 bytes of the next byte
			pos += 1
		filedata[pos] = filedata[pos] << 4 	#For the last byte