Not sure if you wanted the trigger to be PJSalt or Salty, so I went with Salty:

Code:
on *:TEXT:Salty:#: {
  if ($nick == yournick) {
    .msg $chan PJSalt
    .msg $chan PJSalt PJSalt
    .msg $chan PJSalt PJSalt PJSalt
    .msg $chan PJSalt PJSalt
    .msg $chan PJSalt
  }
}

Change, yournick, to whatever your nick will be when you want "Salty" to trigger. Be careful though, this could be classed as a flood and result in your bot getting kicked or banned.

If you want to slow the output ... you can try:

Code:
on *:TEXT:Salty:#: {
  if ($nick == yournick) {
    .timer 1 0 .msg $chan PJSalt
    .timer 1 1 .msg $chan PJSalt PJSalt
    .timer 1 2 .msg $chan PJSalt PJSalt PJSalt
    .timer 1 3 .msg $chan PJSalt PJSalt
    .timer 1 4 .msg $chan PJSalt
  }
}