I think it is better if you actually encourage OP instead of laughing him off. We were all newbies at some point and we all made mistakes that truly defined our characters.
My bad! Though, I'm not trying to mock OP or anything just that, I wasn't hoping on such for a first response you know, it could be very discouraging as, it deals on the places where your not being observant. Fir sure, OP did good and practically coming up with his or her own pictures you know, making screenshot of the process as I suppose he or she did and using them correcting on a thread means goes to prove a lot and with his or her attitude to think towards helping others.
We've all been there and it's important to see corrections as being corrections and nothing more. It doesn't matter how its been presented but the most important thing is that, the correction should be noted and taken.