House breaking a puppy?

6 hours? That's a long time for a puppy, I recommend maybe coming home during a lunch break to take him outside. But to answer your question, you have the right idea, however maybe give the dog a treat and PLENTY of praise when it goes outside. When you see the puppy sniffing in circles that usually means it has to go to the bathroom so take it outside ASAP. Also after playing, feeding, even napping, take the puppy out. When it goes in the house while you are gone, there is no point in scolding it then because it forgot what it has done. But when you see him do it, scold him with a stern. "No" and rush him outside. When he goes outside, praise him, the cycle continues. Good luck