Deck the halls with .......
    ||-------------------|------------------|------------------|
    ||.------------7-----|----7-------------|----7-6-7---------|
    ||.-----7-6-4-----4--|--6----4-6-7-4-6--|-4----------------|
    ||---4---------------|------------------|------------------|
    ++-------------------+------------------+------------------+
    ++-------------------+------------------+------------------+ 2x