#!/bin/sh
#
# Create a animation of a flexing image using wave
#
command='convert -delay 10 koala.gif'
command="$command -background lightblue -bordercolor lightblue -border 0x10"

for i in `seq 10 -2 -8; seq -10 2 8`; do
  command="$command \\( -clone 0 -wave ${i}x150 \\)"
done

# remove original image
# center all the image frames vertically by center cropping
command="$command -delete 0 +repage -gravity center -crop 0x98+0+0"
command="$command +repage -loop 0 animated_flex.gif"

eval $command

chmod 644 animated_flex.gif