I am new to ROS. I am using virtual machine ubuntu server and i am accessing through my mac terminal. I have installed ROS melodic and turtlebot3. I have no problem running roscore but when i run the below command i can it getting started but i dont see any GUI where i see and more turtle. Ideally, there should be another window opened with GUI but nothing happens.

 ranjanj1@ubuntu:~/catkin_ws$ `roslaunch src/turtlebot3/turtlebot3_example/launch/turtlebot3_illumination.launch`


... logging to /home/ranjanj1/.ros/log/979f6ed8-911c-11eb-b6ff-000d3a9e9da4/roslaunch-ubuntu-15343.log
Checking log directory for disk usage. This may take a while.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.

started roslaunch server http://ubuntu:39947/

SUMMARY
========

PARAMETERS
 * /rosdistro: melodic
 * /rosversion: 1.14.10

NODES
  /
    turtlebot3_illumination (turtlebot3_example/turtlebot3_illumination)

auto-starting new master
process[master]: started with pid [15353]
ROS_MASTER_URI=http://localhost:11311

setting /run_id to 979f6ed8-911c-11eb-b6ff-000d3a9e9da4
process[rosout-1]: started with pid [15364]
started core service [/rosout]
process[turtlebot3_illumination-2]: started with pid [15367]

Ubuntu version:

ranjanj1@ubuntu:~/catkin_ws$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 18.04.3 LTS
Release:    18.04
Codename:   bionic![image description](http://)