class MAIN create make feature -- Main b1: BANK_ACCOUNT b2: BANK_ACCOUNT make is -- Main routine, called when the program is executed. do create b1.make create b2.make b1.deposit (100) b1.withdraw (20) b1.transfer (b2,30) check b1.balance = 50 b2.balance = 30 end -- this one will break b1.transfer (b1,15) end end