I need pseudo code for a snake game?

Like your standard 70's game, but done with parts. By pseudo I mean verbal code, i.e for a calculator GUI you would say "Check if a button has been pressed, check if it's a numerical value, if not return false, if it is put it in a table. Check again, if it's a numerical value, add it to the table, if it is a function then begin a new table and make a note of the function"

Thanks.