Mishnayos Yoma Perek 5 Mishnah 7

Each action performed in the context of the service of Yom Kippur stated in the mishna, as in the Torah, is listed in order. If the High Priest performed one of the actions before another, he has done nothing. If he performed the sprinkling of the blood of the goat before the sprinkling of the blood of the bull, he must repeat the action and sprinkle the blood of the goat after sprinkling the blood of the bull, so that the actions are performed in the proper order. And if the blood spills before he completed the presentations that were sprinkled inside the Holy of Holies, he must slaughter another bull or goat, and bring other blood, and then repeat all the services from the beginning inside the Holy of Holies. And similarly, if the blood spills before he finishes the presentations in the Sanctuary, he must begin the service in the Sanctuary from the beginning, and likewise with regard to the sprinkling of blood on the golden altar. Since they are each acts of atonement in and of themselves, there is no need to repeat the service of the entire day from the beginning. Rather, he need only repeat the specific element that he failed to complete. Rabbi Elazar and Rabbi Shimon say: From the place that he interrupted that particular service, when the blood spilled, there he resumes performance of that service. In their opinion, each individual sprinkling in each of these services is an act in and of itself, and there is no need to repeat what he has already done.