Firstly, as our helicase moves this way we see that the DNA polymerase is able to actually form the leading strand and our lagging strand at about the same exact time. And this type of process also ensures that the DNA polymerase creates both of these strands in the five to three direction. So, going this way, we synthesize in a five to three fashion. And going backwards, we also synthesize in the five to three fashion, which is the only way by which DNA polymerase actually synthesizes our new daughter DNA strands. Now, once we actually form all these Okasagi fragments, once we form the lagging strand, we have to connect those lagging strands. And the way we connect those strands is we remove these purple primers and we replace them with the proper nucleotides.