According to the excerpt, how does pepys react to the fire? did his reaction change over the course of the excerpt?

That it wasn't important (and he went back to bed!)

"...In the early hours of 2 September 1666, Pepys was woken by his servant who had spotted a fire in the Billingsgate area. He decided the fire was not particularly serious, and returned to bed. Shortly after waking, his servant returned, and reported that 300 houses had been destroyed and that London Bridge was threatened. Pepys went to the Tower to get a better view. Without returning home, he took a boat and observed the fire for over an hour. In his diary, Pepys recorded his observations as follows: