[![enter image description here][1]][1]Using 2 command blocks, 1 comparator, 1 building block, 1 redstone torch. You can accomplish this thus:
- Command Block 1:
testfor @e[r=radius, type=VillagerGolem] - Command Block 2:
your command
You will still need to put a clock on it. Mine is underneath the golem :) [1]: https://i.sstatic.net/Ehhna.png
