Need help kingdom hearts

So I am in traverse town and I talked to duck in blue.Then some plays and tells me to go through.The backdoor but the thing is where is the backdoor?Thanks.

Walk around till the blue edges of the screen go red and the sound gets faster.
The redder and louder it is, the closer you are.

Replying to #2

Thanks I am so dumb.

Replying to #3

Wait I still have not got past it.