[magick-users] Adding multiple images to one animation frame

[Josh]

I would like to add multiple images to a single animation frame.

For simplicity I am working with the examples in the anim basics
(http://www.imagemagick.org/Usage/anim_basics/)

convert -delay 100  -size 100x100 xc:SkyBlue
 -page +5+10 balloon.gif \
 -page +35+30 medical.gif \
 -page +62+50 present.gif \
 -page +10+55 shading.gif \
 -loop 0  animation.gif

The end result I would like to have is a two-frame animation where
"balloon" and "medical" appear together and then "present" and
"shading" appear together. I am attempting something like this.

convert -delay 100  -size 100x100 xc:SkyBlue
 -page +5+10 balloon.gif  -page +35+30 medical.gif -composite \
 -page +62+50 present.gif  -page +10+55 shading.gif -composite \
 -loop 0  animation.gif

Any ideas?

Thank you,