I can see how the contrasting colours and shapes were attractive chroix, and could in themselves make a very good picture. You're not a million miles off here at all, but personally I think moving in a little, eliminating the window on the right hand side wall and the smaller shed on the left would be better. Also, maybe moving round to be more directly in front of the barn might help to focus on the triangular roof and the contrasting rectangular doors. I don't really like the way the roofline slides offout the righthand side of the frame. Finally, I think I'd wait until all people were out of the frame, as I think they do distract from the colour and composition aspect you were after.