and Nageru's themes can use a simplified version of Movit's API where
most of the low-level details are abstracted away.
-Every frame, the theme choses a chain and a set of parameters to it,
+Every frame, the theme chooses a chain and a set of parameters to it,
based on what it thinks the picture should look like. Every chain
consists of a set of *inputs* (which can be either live video streams
or static pictures) and then a set of operators or *effects* to combine