Not really sure what you're struggling with here. Are you trying to create your own tileable textures, or are you looking for the mentioned jungle tileset?
If you're looking for the jungle tileset, I think you can download this for free once you've purchased a license for Construct 2.
If you're trying to create your own tile-able tileset, just google: "tileable texture tutorial" and pick one you understand/like.
This is a good one to start with: