Take an image and make it pretty!

colorme.sh

#!/bin/bash
COLORS=( red green blue cyan magenta yellow orange pink purple )
TMP_DIR=/tmp/colorme/`date +%s`
OUTPUT="$HOME/Desktop/animated.gif"
DELAY=5

# Create us a temp directory
mkdir -p $TMP_DIR

# Create a base grayscale image to colorize
echo "Creating base image."
convert -verbose -colorspace gray $* $TMP_DIR/base.jpg
echo ""

# Loop through the colors and create images for them
echo "Creating colorized images."
for i in "${COLORS[@]}"; do
  convert -verbose -modulate 130 -fill $i -tint 30 $TMP_DIR/base.jpg $TMP_DIR/colored_$i.jpg
done
echo ""

# Build the gif
echo "Building the gif and dumping it to $OUTPUT"
# convert -verbose -delay $DELAY -loop 0 -resize 500 -layers OptimizeTransparency $TMP_DIR/colored_*.jpg $OUTPUT
convert -verbose -delay $DELAY -loop 0 -layers OptimizeTransparency $TMP_DIR/colored_*.jpg $OUTPUT
echo ""

# Clean up after ourselves
echo "Cleaning up temp files."
rm -rf $TMP_DIR
echo ""

This needs ImageMagick, yo.