a language the computer understands for this we'll use math okay so now you're wondering well how do we write the goal of walking without falling as long as possible in math well that's often hard for different tasks but you can think of it as writing down a formula and what this formula does is it scores so in the case of walking it'll score every move the robot makes if the move it makes helps the robot walk it gets a high score if the move that the robot speaking makes the robot unstable it gets a low score and now the robots goal