Connections
Puzzle #1172
π¨π¨π¨π¨
πͺπ¦πͺπͺ
π©π©π©π©
π¦πͺπͺπͺ
πͺπͺπ¦πͺ
πͺπͺπͺπͺ
π¦π¦π¦π¦
I didn't know...
..."key signature" and had no clue on blue. I just got lucky in the end.