Create morphed animated GIF with delay at beginning and end

convert.sh

#!/bin/bash

brew install imagemagick

convert -delay 5 001.jpg 002.png -morph 20 -loop 0 gif:- | convert - \
  \( -clone 1 -set delay 300 \) -swap 1 +delete \
  \( +clone -set delay 500 \) +swap +delete \
  output.gif