dc to ac circuit

hello i have to built dc to ac circuit for my project. i also have to simulate this circuit on multisim software. please provide me the circuit so i can move forward on my project. i tried <a href="https://www.aaroncake.net/Circuits/6-12conv.asp" target="_blank" rel="nofollow noopener noreferrer">6V to 12V Converter</a> circuit and it is not working on multisim.