It just run, it just runs through the sequence. so when we say that a CPU operates at 2 gigahertz, two billion operations per second, it's these little instructions that those refers to. so there are, there's obviously a, a big variety of instructions, but I'm just kind of point out a couple of special types. so one type of instruction has the effect of changing the order that the instructions, normally the CPU just runs down the list, does them in order. 