What does "jangan buang sampah sembarangan" Mean?

omg the bighead are coming ... nice work dude! please check out: my newest short " whats for homework " -- http://www.aniboom.com/video/282232/Whats-for-home work-? .......and gimme some feedback if u like !? thx

http://www.aniboom.com/video/314838/Flight-of-Fanc y/

wow cool.......man http://www.aniboom.com/video/315861/Back-To-Zero/

wow cool...... man!