How do I make a sprit move down and left and right on it own

How would I go about making a sprite thats not controlled by the player move left to right and or move down?

You might be able to find what you are looking for by searching the tutorials section

https://www.scirra.com/tutorials/search?q=moving%20npc

If you are using the platformer or 8direction behavior you can use the 'simulate control' actions to move AI around according to event logic.

Sines can also be used to move enemies, though that's a little more complicated. Here are some links:

https://www.scirra.com/manual/103/sine

Here's a capx I set up w/ invisible barriers to contain enemies (they just walk back and forth like goomba's)

https://www.dropbox.com/s/xkd1uefwp8ffb ... .capx?dl=0

thanks! worked great i used the sine