Published: Sep 07, 2012 10:21 PM EDT

NAPLES, Fla - Classmates and friends of Gulf Coast High School junior Diana Zulian honored the teen at Friday nights football game against Palmetto Ridge.

Fans dressed in Diana's favorite color, purple, paused for a moment of silence and released dozens of purple balloons into the sky.

Diana's mother tells WINK News her daughter became ill on August 9th with a fever and other symptoms. They had more than 300 tests done and went to three hospitals, but now one was able to give a diagnosis.

Diana's mother says her daughter started cheerleading when she was six years old. She was also a member of her church group and passionate about the water, beach and marine life, wanting one day to be a marine biologist.

An autopsy is being done to determine the exact cause of death. Her funeral is set for Sunday at 1:30 p.m. At Vanderbilt Presbyterian Church in Naples. A candlelight vigil will also be held at the church at 8:00 p.m. Sunday.