It is 7 a.m. in the morning and Serena is entering her home, back from the early shopping spree she took.
Every morning at 10 a.m. Serena hears a police siren from outside and so she covers her ears. The police siren is the unconditioned stimuli (stimulus that causes a response that is not automatic).
Serena likes to have a good long look at her lava lamp every time right before 10 a.m. This is the unconditioned response (response that occurs from a conditioned stimulus).
The next day, right after Serena finished staring at her lava lamp, the police siren could be heard and so she covered her ears. This is a conditioned stimulus (stimulus that causes a response because you learn to associate it with something else).
The following day, when Serena finished her daily stare at her lava lamp, she immidetaheard the police siren the next day, she automatically covered her ears. This is the conditional response(learned response to a stimulus that is previously neutral).
Serena is now accustomed to her routine of staring at her lava lamp then hearing a police siren.