Install KtSkript and create a file like config/kt-skript/scripts/my-cool-script.ktskript
and put this in there:
registerCommand("roll") {
action(onlyPlayers = true) {
val randomNumber = randomInt(start = 1, end = 100)
val players = player.location.getNearbyEntitiesOfType<Player>(distance = 50.0)
"&eThe random number is $randomNumber!".t.sendTo(players)
}
}
Then execute the /roll
command, and tweak the things (text, color, number range, max distance to other players).