Also it would be nice if someone could explain multiple connections, like the following image to me.

It will help making the normal none-player-designed levels easier to craft too

@TutorialDoctor I can't use individual objects. I forgot to mention it is going to be a level editor, let me show an image of what I mean:
As you can see when in the level editor( when implemented) someone previews their level, I want the blocks to automatically change sprites to the edges and such.
Hope this helps.

So I want to check 'if there is an object to the left, right, up, or down of my object'. I tried 'collided' but i don't know how to do 'if colliding with nothing'. I'm basically trying to set my object to a specific graphic if there is another object to the left of my selected object. Any help would be appreciated. Keep in mind I can't use specific object as I'm planning for an in-game level editor that hopefully you can save your levels, either online or offline.

if you check my replies I provided images of what I tried to explain