Welcome to the House of Music.
I hope you are ready for the last task.
A lot of music is played in here, and the house does carry some secrets.
Solve this task, by telling me how many songs hide in here.
Behind every glass pane, there is 1 song.
If the pane is square, there are 4 songs.
If the pane is ball round, there are 8 songs.
How many songs are hiding behind the marked windows?
Enter the answer here: (xx)