Need imposition script

Hi All,

Good Day. I need to make 4 page document into 2 page like below. The width will be twice before moving the page 4 into 1

Source               Final

The below coding Is I wrote for Indesign.

var myDoc=app.documents[0];
var mywidth=myDoc.documentPreferences.pageWidth;
var myheight=myDoc.documentPreferences.pageHeight;
var myX = (myDoc.pages[0].bounds[3] - myDoc.pages[0].bounds[1] );  
var myY = (myDoc.pages[1].bounds[3] - myDoc.pages[1].bounds[1] );  
myDoc.documentPreferences.pageWidth=mywidth*2;
myDoc.viewPreferences.rulerOrigin = RulerOrigin.PAGE_ORIGIN;  
app.activeWindow.transformReferencePoint = AnchorPoint.TOP_LEFT_ANCHOR;
myDoc.pages[1].pageItems.everyItem().move(myDoc.pages[1], [-myX,0]);  
myDoc.pages[2].pageItems.everyItem().duplicate(myDoc.pages[1], [0,0]);  
myDoc.pages[3].pageItems.everyItem().duplicate(myDoc.pages[0], [-myX,0]);  
myDoc.pages[3].remove();
myDoc.pages[2].remove();

I need the same functionality into PDF. I know about Quite Imposing plugin, but our team like to do this in script.

Please give me some suggestion, if anybody have this script then it would be great if you share those.

PS: I found one interesting link... Small imposition script: Where to start?

Thanks,

K