Scratch

Almost done with a game called "My Puppy", a simulation project where you adopt a puppy, name it, care for it, compete in dog shows, play games, go places, etc.
Anyway, there are two things I need to figure out.

First off, when you scroll over your puppy, it barks happily and wags its tail. The problem: when the sprite is hidden, this script is still in action. Scroll over the area where the dog should be and the invisible puppy will bark... I need to fix this, though it isn't a major issue.

Second, there is a possibility that when you go to the park, you can find different things lying around. One object is a letter that may appear on the bench. When you click on it, a close-up letter sprite appears and lets you read the whole note. Scroll over the note, a bottom corner lifts up and you can turn the page over to read the back; you can also turn it from the back to the front; however, when the mouse-pointer is not touching the note anymore, the script stops... Yes, it is "forever if". I have also tried "repeat until < not < touching mouse-pointer > >". Plus, when the back page is clicked, it doesn't return to the front...
If you need me to post the actual blocks, I can, but here is basically what I have:

I have it to where there is a variable called "page#?". When flag is clicked, page#? sets to 0. Forever if page#? = 0 and mouse-pointer is touching sprite, (Just scroll over it.) switch to costume with corner pulled up. Now, when sprite is clicked, forever if page#? = 0, switch to costume of writing on back and set page#? to 1. Forever if page#? = 1 and mouse-pointer is touching sprite, (Scroll over it again.) switch to costume of back page with corner pulled up. If sprite is clicked, forever if page#? = 1, switch to first costume of front page and set page#? to 0.