- |pxs| & Previous x's (state)\\
- |x| & New input value\\
- |pxs <++ x| & Remember new |x|, remove oldest\\
- |pxs ** hs| & Output
+ {\color<2>[rgb]{1,0,0}|pxs|} & Previous x's (state)\\
+ {\color<3>[rgb]{1,0,0}|x|} & New input value\\
+ {\color<4>[rgb]{1,0,0}|pxs <++ x|} & Remember new |x|, remove oldest\\
+ {\color<5>[rgb]{1,0,0}|pxs ** hs|} & Output