Well this works


Code:
//var %x = 1, %t [ $+  [ %x ] ] $rand(1, [ %x ] ) | echo -a %t1


And to make it a bit more interesting

Code:
//var %x = 100, %t [ $+  [ %x ] ] $rand(1, [ %x ] ) | echo -a %t1 [ $+ [ $x ] ]


laugh