Description
Some commands support the use of a Boolean flag argument to specify which of two possible conditions is desired such as whether an object should be made solid or unsolid, or perhaps used to decide between an object being visible or invisible.
The flag can be either "on", "true", or "yes" to indicate an affirmation, and either "off", "false", or "no" to indicate a negation.
In the case of the Astart command, the flag argument specifies whether or not the animation will run in "looping" mode and can be either "on", "true", or "yes" to make the animation looping, and either "off", "false", or "no" to make it non-looping.
Examples
bump visible true; activate visible false
bump visible sign1 on
create name jumper1, animate mask me jump 5 9 100 1 2 3 4 5 4 3 2 1, astop; activate astart off
create animate me jump 5 5 100 1 3 5 3 1, astart no; activate astart no, astart jumper1 yes
bump visible door1 off
create solid no
activate solid trapdoor1 off
create visible off
create name sign, visible off