This is a script for a "heal" chat command for the roll20 virtual tabletop API.

gistfile1.txt

// This is a "heal" chat command for the roll20 virtual tabletop API. 
// It can be used to heal all 3 bars for a token by name, 
// or you can have it heal the tokens for all the characters in your campaign's journal. 
//
// E.g: 
// Healing one character named "Dave the Dwarf": 
// !heal Dave the Dwarf 
//
// Healing all characters 
// !heal all
on("chat:message", function(msg) {
    var cmdName = "!heal ";
    var msgTxt = msg.content;

    // heals one token specified by name.
    var healCharacter = function(targetName) {
        sendChat(msg.who, "/em heals " + targetName);

        var targetsMatched = findObjs({_type: "graphic", name: targetName});
        if(targetsMatched.length === 0) {
            sendChat(msg.who, "target " + targetName + " not found.");
        }

        // heal the character token on all pages.
        for(var x in targetsMatched) {
            var target = targetsMatched[x];

            if(target.get("bar1_value") !== "") {
                target.set("bar1_value", target.get("bar1_max"));
            }

            if(target.get("bar2_value") !== "") {
                target.set("bar2_value", target.get("bar2_max"));
            }
           

            if(target.get("bar3_value") !== "") {
                target.set("bar3_value", target.get("bar3_max"));
            }

            target.set({
              status_greenmarker: false,
              status_bluemarker: false,
              status_redmarker: false,
              status_dead: false
            });
        }
    };

   
  // Check for our heal command in the chat message.
  if(msg.type == "api" && msgTxt.indexOf(cmdName) !== -1) {
    var targetName = msgTxt.slice(cmdName.length);

    // heal only one character
    if(targetName !== "all") {
        healCharacter(targetName);
    } 

    // heal all characters
    else {
        var allCharacters = findObjs({_type: "character"});
        for(var x in allCharacters) {
            var character = allCharacters[x];
            healCharacter(character.get("name"));
        }
    }
  }
});