Run the following commands:
$ cd catkin_ws/src
$ git clone https://github.com/arsh09/rrr_bot.git
$ cd ..
$ catkin_make
$ source devel/setup.bash
$ roslaunch rrr_bringup rrr_bot_bringup.launch
$ cd catkin_ws/src
$ git clone https://github.com/arsh09/rrr_bot.git
$ cd ..
$ catkin_make
$ source devel/setup.bash
$ roslaunch rrr_bringup rrr_bot_bringup.launch