If you believe from the evidence beyond a reasonable doubt that the defendant was with some fault in provoking or bringing on the difficulty, and if you further believe that when attacked
1. He retreated as far as he safely could under the circumstances, and
2. In good faith attempted to abandon the difficulty, and
3. Made known his desire for peace by word or act, and
4. He reasonably feared, under the circumstances as they appeared to him, that he was in danger of being killed or that he was in danger of great bodily harm,
then the killing was in self-defense and you shall find the defendant not guilty.