Spider web for a corner. My original www.thingiverse.com/thing:6779057 was the first "thing" I ever did. a few years later and a tiny bit more knowledge with cad I can do something not so embarrassing! I have included the original for nostalgia's sake and several updated versions. all a little different. some with a “fun” spider, some with a more iconic looking spider. With two different style webs. Suggestions, tweaks, or needs? just let me know. I'll try. 

Those with words have the Happy Halloween slightly taller than the rest of the web so you can do a filament change. In the past I have done the majority in a matte color then at the last few layers I switch to a gloss. It's not hard to see in but it makes it stand out a little more. Currently I just do the whole thing in gloss, and lightly sand the words, so it's a differentiating shade. You don't have to. I have the one up in my work office door now for three plus years. I definitely suggest using a brim. spider legs can easily raise if you don't. 

Enjoy!!