Something

alias reverse {
  var %old = $strip($1-), %temp = $len(%old), %char, %string
  while (%temp > 0) {
    %char = $mid($1-,%temp,1) | if (%char = $chr(32)) { dec %temp | %char = $mid(%old,%temp,1) | %string = %string %char }
    else { %string = %string $+ %char } | dec %temp
  }
  if ($isid) return %string | else msg # %string
}

alias rainbow {
  var %temp = 1, %max = $len($1-), %char, %string, %color = 3 4 5 6 7 8 9 10 11 12 13, %cs = $rand(1,$numtok(%color,32))
  while (%temp <= %max) {
    %char = $mid($1-,%temp,1) | if (%char isnum) %string = %string $+  $+ $gettok(%color,%cs,32) $+ ,99 $+ %char
    elseif (%char = $chr(32)) { inc %temp | %char = $mid($1-,%temp,1) | %string = %string  $+ $gettok(%color,%cs,32) $+ %char }
    else { %string = %string $+  $+ $gettok(%color,%cs,32) $+ %char }
    inc %temp | inc %cs | if (%cs > $numtok(%color,32)) %cs = 1
  }
  if ($isid) return %string | else msg # %string
}