Roll20 Dance party

DanceParty.js

on("chat:message", function(msg) {
    var cmdName = "!dance";
    var msgTxt = msg.content;
    
  // This provides a chat command to heal a character by name. 
  // Alternatively, you can heal all named tokens using "all" as the target.
  if(msg.type == "api" && msgTxt.indexOf(cmdName) !== -1) {
    var danceCounter = 0;
    var curPageID = findObjs({_type: "campaign"})[0].get("playerpageid");
    
    sendChat(msg.who, "Everypony DANCE! :D");
    
    var allCharacters = findObjs({_type: "graphic", layer: "objects", _pageid: curPageID });
    
    var interval = setInterval(function() {
        if(danceCounter < 4) { 
            for(var x in allCharacters) {
                var character = allCharacters[x];
                character.set("fliph", !character.get("fliph"));
            }
        }
        else if(danceCounter >=4 && danceCounter < 8) {
            for(var x in allCharacters) {
                var character = allCharacters[x];
                character.set("rotation", character.get("rotation")+90);
            }
        }
        else {
            clearInterval(interval);
        }
        
        danceCounter++;
    }, 500);
  }
});