///////////////////////////////
//if this was lite-c i would make a BMAP* array, that would make life easier,especially at changebmap()
bmap b1 = "sp.tga";
bmap b2 = "sp2.tga";
bmap b3 = "sp3.tga";
panel ui {
	bmap = b1;
	flags = VISIBLE;	
}
var bmapno = 1;
on_e = changebmap;

function main(){
	wait(1);
}

function setbmap(bmp1){
	ui.bmap = bmp1;
}
function changebmap(){
	if(bmapno==1){
		setbmap(b2);
		bmapno =2;
		return;
	}
	if(bmapno==2){
		setbmap(b3);
		bmapno =3;
		return;
	}
	if(bmapno==3){
		setbmap(b1);
		bmapno =1;
		return;
	}
}

// theory / example only;  code will NOT work as is 
BMAP im1 = "sp1.tga";
//-load them all from a directory automatically?
BMAP* im_;  // image pointer
var im_a[32]; // image (handle var) array
var im_nC = 0; // image count 0 - 31
var im_nI = 0; // current image index
//...
im_a[im_nC] = handle(im1);
im_nC+=1;
//...
//next image
im_nI+=1;
im_ = ptr_for_handle(im_a[im_nI]);
panel.bmap = im_;