Adding transition together with multiple overlay images using FFMPEG

I am using ffmpeg for image overlay.

I have multiple images, which I wanted to overlay. My below code workd great for this.

ffmpeg -i D:/Test.mp4 
-i D:Imagestest.jpg 
-i D:Imagestest2.jpg 

-filter_complex  "(0)(1)overlay=x=0:y=0:enable='between(t,1237.216831,1837.216831)'(v1);

 -map "(v2)" -map 0:a

Now, I wanted to bring different effects at the time of image overlay. I learnt give effects using code


How do I apply transitions in my overlay image code together?

Please guide.

Kind Regards,