Final answer:
In 'The Office' S4E5 'Local Ad', an intern at the ad agency designs the computer animation sequence for Michael's commercial, which adds a humorous touch to the episode due to its low quality.
Step-by-step explanation:
In the S4E5 "Local Ad" episode of The Office, the computer animation sequence for Michael's commercial is designed by an intern at the ad agency.
While Michael and the Scranton branch are excited to produce their own creative ideas for the commercial, the ad agency ultimately decides to use their professional resources. The intern's lack of experience is humorously evident in the low quality of the animation, which is a point of comedic relief in the episode.