Festival summer glory clone

[marcarm]

I've recently moved on to making extract brews from kits. I made the summer glory ltd edition over the summer and it was blooming lovely, so was thinking I might try and replicate it, but have no idea where to start.

The box says that it has cascade and crystal hops, and it also came with elder flowers.

As a novice, I've never come up with my own recipe before, and would have no idea about quantities, so anything I do will probably turn out horrible.

Any ideas about how I can make this beer?