[0 0 0 0] [0 0 0 0] ;; (println opcode empty-opcode)
NOT match (it's an else part of if)
Executing opcode =>  [0 0 0 0] ... (println "Executing opcode => " opcode "...")

[0 0 0 0] [0 0 0 0]
NOT match
Executing opcode =>  [0 0 0 0] ...

[0 0 0 0] [0 0 0 0]
NOT match
Executing opcode =>  [0 0 0 0] ...