Make a 2Dmap without keyboard op [closed]

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Hi I'm a biginner and learning about ROS with Turtlebot2.
I tried SLAM by reading tutorials, http://wiki.ros.org/turtlebot_navigat... and http://wiki.ros.org/turtlebot_navigat... .
These tutorials told me how to make a map and do autonomous running with it.

When I tried tutorials, I controled Turtlebot2 by using a keyboard. It was hard.
I think that can I make a map with Turtlebot2 automatically running.
Is it difficult plobrem? Please give me reference literatures or information. Thank you.