is it possible to see all Sequences which are created?

I create a sequence in a loop again and again and i thougth the old sequence will be overwritten. But when i printed the sequence i saw the internal name is sequence-1, sequence-2 and so on. Will the sequence be overwritten or do i get thousands of different sequences? Do sequences destroy themselves after they finished or must i call sequence.finish() to destroy?

Intervals destroy themselves after they finish (assuming you’re not holding a pointer to it). You can see the currently active intervals with:

print ivalMgr