So let's begin with our parent strand that runs from the three to the five direction. So we can imagine that DNA helicase attaches to the origin of replication. It moves a certain distance and it unwinds our double stranded DNA. So first we have the primates that lays down the RNA primer. So let's suppose we have our RNA primer as shown and then what happens? Our DNA polymerase basically continuously forms our nucleotide piece by piece.