New in version 2.0.
Repeat sequence elements at indices specified by cycle_token to total length:
abjad> from abjad.tools import sequencetools
abjad> sequencetools.repeat_sequence_elements_at_indices_cyclically(range(10), (5, [1, 2]), 3)
[0, [1, 1, 1], [2, 2, 2], 3, 4, 5, [6, 6, 6], [7, 7, 7], 8, 9]
The cycle_token may be a sieve:
abjad> from abjad.tools import sievetools
abjad> sieve = sievetools.cycle_tokens_to_sieve((5, [1, 2]))
abjad> sequencetools.repeat_sequence_elements_at_indices_cyclically(range(10), sieve, 3)
[0, [1, 1, 1], [2, 2, 2], 3, 4, 5, [6, 6, 6], [7, 7, 7], 8, 9]
Return list.