When you convert it to a symbol you have to select both the fill and the stroke.
name all the instances: star01_mc, star02_mc, star03_mc
// all properties use the period . syntax
star03_mc.x = 400; //this repositions star03_mc over 400 pixels
star03_mc.y = 322;
//it moves absolutely from the upper left hand corner, it is not based on where it started on the stage.
star02_mc.alpha = .5; //transparency; uses decimals as percentages
star03_mc.rotation = 180;
//you can use a number greater than 360, it just keeps going. A negative number makes it go counter clockwise.
star03_mc.scaleX=.2; //1.2 would scale it up 120%
star03_mc.scaleY=.2; //have to scale both x and y to be proportional
//or you can combine it like this:
star02_mc.scaleX = star02_mc.scaleY =1.2; //
//not there - invisible
star01_mc.visible = false;
// it is not there, as opposed to alpha 0 where it is still there be not visible. The object is technically still on the stage but would not be click-able if it were a button for example.
Homework :Read Chapters 1 and 2