Kodeksi were formed in 1965 as a hobby cover band by Eduard "Edo" Bogeljić. The group also featured on backing vocals and Luciano Paganotto on drums. Not too long after formation, Bogeljić invited Željko Bebek to join as a singer and rhythm guitarist. Simultaneously to their high school studies, Kodeksi members spent the rest of the decade playing local dance parties with a repertoire of covered tunes they would hear on Radio Luxembourg. In the process, they built up somewhat of a local youth following in Sarajevo.