You can refer to something that you have done or made yourself as your handiwork .
例句
The architect stepped back to admire his handiwork...设计师后退一步以欣赏自己的作品。While the government said the fire was accidental, residents of the town alleged it was the handiwork of the security forces.虽然政府称火灾是场意外,镇上的居民却断言这是保安部队的杰作。
英汉词典释义
n.
手工, 手工艺(品)
Is this your handiwork?这是你的手工吗?He stood back to admire his handiwork.他退后几步欣赏自己的手艺。
结果, 行为
This explosion looks like the handiwork of terrorists.这次爆炸看起来是恐怖分子干的。