Two Sequential Keys

Your code should do nothing until the letters ‘O’ and ‘M’ are pressed on the keyboard in sequence (‘O’ first, then ‘M’) with no other keys being pressed in between. It should write the value -1 to RAM[0]. For example, if the key sequence ‘OHMOMAAAAHWAITNOIDID- NTMEANTODOTHATUNDOUNDOUNDO’ is entered, then RAM[0] should be changed to -1 on the second ‘M’ and then not do anything further.