Roll20 API script to show the health of any tokens on the object layer on the current map the GM is looking at.

ShowHealth.js

on("ready", function() {

    on("chat:message", function (msg) {
        if (msg.type === "api" && msg.content === "!ShowHealth")
        {
            var page = getObj('page', getObj('player',msg.playerid).get('lastpage')).id;
            var tokens = findObjs({type: 'graphic', _pageid: page});
            for (var i=0; i<tokens.length; i++)
            {
                if (tokens[i].get("bar1_value"))
                {
                    tokens[i].set("showplayers_bar1", "true");
                }
            }
        }

    });

});