(as shown on the left.)
If the human went into the house at the same time the rikchik left, it would be:
(as shown on the right) so that the two movements would be collected as the same moment.
Tenses are usually indicated with the "Me/Here/Now" glyph. More examples later.
Sentences that end without a sequence are usually assumed to be in the recent past. The remote past is usually specified with an opening sentence of the "Once upon a time" variety. Rikchiks have a stock selection of such phrases, for different times and places in their history. These opening sentences may be collected with a Source relation to emphasize their opening-ness; likewise, a closing sentence may be collected with a Destination relation. Neither of these should be sentences that actually specify events that are "part of the story"; they are establishing or framing devices only.
The length of time between two events in a Sequence may be specified by having the Sequence, between collecting those two events, collect a length of time with the Quality relation.
The imperative is usually accomplished by putting something in the
near future and stating it as fact. The English equivalent would
be something like "Now. Next, you coming here." A more
polite imperative results from putting a nothing option with the
statement: "Now. Next, you coming here, or not."
Better examples later.