Here ya go, change out '   someattribute   ' to the name of what attribute you're looking for:  on("change:graphic", function(obj) {
    let adjust = 0; /* variable for the adjustment */
    /* find the attribute, if it exists */
    let attr = findObjs({
        characterid: obj.get('represents'), /* Character the object represents, could be empty */
        name: '  someattribute  '  /* name of the attribute to get */
    })[0];  /* findObjs() returns an array, so take the first entry */
    /* if we found it, get it's value or 0 */
    if(attr){
        /* attribute values are generally strings so convert to an integer, */
        /* or use 0 if it can't be converted to an integer */
        adjust = parseInt(attr.get('current'),10)||0;  
    }
    if(obj.get("bar1_max") === "") return;
    if(obj.get("bar1_value") <= (7-adjust) ) {
        obj.set({
            status_overdrive: true
        });
    }
    else{
        obj.set({
            status_overdrive: false
        });
    }
    if(obj.get("bar1_value") <= 0) {
        obj.set({
            status_screaming: true
        });
    }
    else {
        obj.set({
            status_screaming: false
        });
    }
});