So, me and 3 friends were trying to get all four ultimate staffs. We were able to get the wind and ice one, but when it came to the lightning staff, I completed the piano step. And got rid of all the spark on each panel.

But when it came to the orb, it wouldn't show up after matching the colours.
Does anyone know how I went wrong, or if i missed something out? I would really appreciate your help.

Thannks a lot.