How do I get an enemy to move?

Hi! i'm trying to make a platform game and i don't know how make the enemy moves from left to right or viceversa. well i hope you can answer my question! sorry for my english im still learning <img src="smileys/smiley17.gif" border="0" align="middle" />

Try the basic platformer tutorial

Reading the manual and doing the beginner tutorials will be very helpful.

thanks! :D