So let's use the color black. So essentially so we use the probability of the product rule to basically determine what the probability is in flipping two consecutive heads. Now if we flip the first time, what's the probability of that? This actually landing tails or landing heads in this case? Well, it's either this side or this side. So it's 50 50 and that means there's a one half chance that this will land up and a one half chance that this will land up.