Someone

Mark the current cell as 'Visited';

If the current cell has any neighbours which have not been visited 
	{
	 Choose one of the unvisited neighbours;
	 Push the current cell on the stack;
	 Knock down the wall between the current 
                   cell and the chosen cell;
	 Make the chosen cell the current cell;
	 Recursively call this function;
	}
else
	{
	 Pop the last current cell off the stack;
	 Backtrack to the previous execution of this function;
	}