ImageMagick 2 pictures on top of 1

I'm using ImageMagick command-line options to create an animation out of several frames. I got it to work but I need to composite 2 pictures onto a third one. Is this possible? So far I have this code :

convert pic1.jpg pic2.jpg -geometry +x +y -composite  result.png

This line puts pic2 on top of pic1, is it possible to put 2 pictures on pic1 similar to this:

convert pic1.jpg pic2.jpg -geometry +x +y -composite pic3.jpg +x +y -composite result.png

Something like this if you get my logic

Solution

Here's how that looks:

magick xc:blue[600x400\!]                           \
   xc:red[100x100\!]  -geometry +100+20  -composite \
   xc:lime[200x100\!] -geometry +300+200 -composite result.png