Did you know you can use THEN instead of AND also?
Question, where are your characters coming from though? You only have (& YOU walks to spot…) but did you spot your characters first?
Also you have to add @pause for 4 (or any amount of seconds can be 3,5 or 6 seconds so that the character has time to do the moves you want them to do.)
this could be shortend as
&MOM spot 0.443 136 285 in zone 2 AND MOM moves to layer 22
rather than it being on two separate lines.