Help with Nether Rune item

I am working on an item where if you right click it in the nether, you return to the overworld and if you right click it anywhere else, it takes you to the nether.  It removes 1 durability out of 50 for each instance.  I attempted to create a procedure for this several times, and this what I got.  However, when I saved the mod elements, it went red and said "Gradle Idle" and didn't let me start up the testing environment.  Can someone tell me what I did wrong, and maybe how to fix it as well?