Modern poster illustrated by a teen for a student hackathon, themed around MBTI personalities of Introversion (I) and Extraversion (E). The background uses high contrast large color blocks, with deep blue and cool tones on the left side representing introversion, and bright yellow and warm tones on the right side representing extraversion. The left side features a minimalist silhouette of a quiet, introspective person with symbols like stars and books, symbolizing the introspective nature of I types. The right side features a dynamic silhouette of an energetic, outgoing person with elements like electric guitars, bright lights, and energetic musical symbols, symbolizing the outgoing nature of E types. Use a musical note or sheet music design element to separate the introverted and extroverted sections. The poster should have a vertical layout with incorporating modern pop and rock music style elements --ar 5:7 --s 750