Simplify the following text for a Grade 10 native English-speaking person.
Original: According to the band 's vocalist Anthony Kiedis , Stadium Arcadium was originally scheduled to be a trilogy of albums each released six months apart , but was eventually condensed into a double album .
Simplified: According to Anthony Kiedis , Stadium Arcadium was going to be three different albums that the band would release ; one every six months .