Added in 2.9
/pause <N>
Pauses the script for N seconds.
The internal state cannot be guaranteed so use with caution.
Parameters
<N> - The number of seconds to pause for.
Example
alias changetopic {
  echo -ag Topic before = $chan(#).topic
  topic # New topic
  pause 3
  echo -ag Topic after = $chan(#).topic
}