something then once I hit two maybe two is a probability of zero point one so we hit level zero point three over here and three might have a probability of maybe 0.5 to go away to zero point eight and then for weight of the probability of zero point two all the way to one what does it mean to sample i given X I have this bit stream so I have a bit stream sitting there I'm going to start from the end here and work my way so the first thing I see is zero zero tells me so I have a zero one interval here zero tells me that I am in the zero to zero