Simplify the following text for a Grade 7 native English-speaking person.
Original: THX 1138 was the first feature-length film directed by Lucas , developed from his student film Electronic Labyrinth : THX 1138 4EB , which he made in 1967 while attending the University of Southern California .
Simplified: It was based on a short film Lucas made in college in 1967 called `` Electric Labyrinth THX 1138 4EB '' .