@startuml
title Step 5 — Final State

object "Node 1" as n1 {
  value = 1
}

object "Node 2" as n2 {
  value = 2
}

object "Node 3" as n3 {
  value = 3
}

n3 --> n2 : next
n2 --> n1 : next
n1 --> "null" : next

object "head" as head
object "previous" as prev
object "current" as cur

head --> n3
prev --> n3
cur --> "null"

note right of head
When current becomes null,
previous points to the new head.

head = previous
end note

@enduml