HTML RESULT 
{sequence 25, push='mySequence'}
{pull mySequence, make,   reversal} {$sequence} {/pull}
1 2 3 4 5 6 7 8 9 1 11 21 31 41 51 61 71 81 91 2 12 22 32 42 52
{pull mySequence, keep,   reversal} {$sequence} {/pull}
1 2 3 4 5 6 7 8 9 11 12 13 14 15 16 17 18 19 21 22 23 24 25
{pull mySequence, remove, reversal} {$sequence} {/pull}
10 20
{pull mySequence, flag,   reversal} {$sequence} {/pull}
1 1 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1 1 1 0 1 1 1 1 1