Riddles In The Dark EP 18 - Colors

Laren Set stood looking at the gothic structure of the temple tower. The wind ruffled his hair as colors played across his face. Blue, purple, pink, red. He waited a moment. The stars splayed across the sky.  Laren Set entered the temple. He exited the temple a few minutes later, looked around, and smiled. 

The question: What was his plan, what did he do in the temple, and what did he see that made him smile?