var targets = creep.room.find(FIND_STRUCTURES, {
                    filter: (structure) => {
                        return (structure.structureType == STRUCTURE_EXTENSION ||
                                structure.structureType == STRUCTURE_SPAWN ||
                                structure.structureType == STRUCTURE_TOWER) && structure.energy < structure.energyCapacity;
                    }
            });
            if(targets.length > 0) {
                //console.log("list isn't empty");
                if(creep.transfer(targets[0], RESOURCE_ENERGY) == ERR_NOT_IN_RANGE) {
                    creep.moveTo(targets[0]);
                    //console.log("if creep.move firing?");
                }
            }