How to score the play of this Cribbage round?

Question

Two players kept the same hands: 2 threes, 1 four, 1 five. The play went as follows (count is in brackets, scoring was quickly beyond us)

• Player 1 led with a 3 [= 3]
• Player 2 followed with a three [= 6]
• Player 1 followed with a three [= 9]
• Player 2 followed with a three [= 12]
• Player 1 followed with a four [= 16]
• Player 2 followed with a four [= 20]
• Player 1 followed with a five [= 25]
• Player 2 followed with a five [= 30]

How does one score this round? (Counting the crib and hands are irrelevant to this, just the play, please.)

Answer 1

• 3
• 3 scores 2 for the pair
• 3 scores 6 for the triple
• 3 scores 12 for the quadruple
• 4 scores nothing
• 4 scores 2
• 5 scores nothing
• 5 scores 2.
• And then that last play also scores 1 for being the last card played to that series, since the opponent has no cards to play and must say "go" at that time.

None of the plays scores a run, as there are other (foreign) cards that interrupt the runs.

Bicycle rules:

it is important to keep track of the order in which cards are played to determine whether what looks like a sequence or a run has been interrupted by a "foreign card." Example: Cards are played in this order: 8, 7, 7, 6. The dealer pegs 2 for 15, and the opponent pegs 2 for pair, but the dealer cannot peg for run because of the extra seven (foreign card) that has been played.