addChild + loading external images

hey,

im trying to load external images, and everything i see tells me to myVar.addChild(loaderWithImage), but i dont really get what im meant to do with it then…

Ive tried setting _x,_y to 100 to set it on screen but aint seeing anything…

I tried making a new movieclip and adding the child that way, is there any chance someone could show me a barebones way to load images then display them on screen?