30 musical changes for seven bells
The changes should be read from top to bottom going down each column in turn.
6 - 7
5 - 7
2 - 3
5 - 3
4 - 6
7 - 4
4 - 5
2 - 7
1 - 3
5 - 1
3 - 2
6 - 3
4 - 7
1 - 7
7 - 5
3 - 1
7 - 6
5 - 3
3 - 5
2 - 5
7 - 3
3 - 5
3 - 6
6 - 4
3 - 7
1 - 5
7 - 1
7 - 2
5 - 2
5 - 4