glitter.sh

#!/usr/bin/env bash
#
# Invoke as 'glitter.sh "glittery text"

BUILD_DIR=$(mktemp -d)
pushd $BUILD_DIR
convert -size 1024x100 xc: +noise Random -separate \
          null: \( xc: +noise Random -separate -threshold 30% -negate \) \
              -compose CopyOpacity -layers composite \
          -set dispose background -set delay 20 -loop 0   glitter_overlay.gif


convert glitter_overlay.gif null: -size 1024x100 \
        plasma:red-firebrick plasma:red-firebrick  plasma:red-firebrick \
        -compose Screen -layers composite    glitter_plasma.gif

convert  -fill white -background none -font Candice \
        -gravity center -pointsize 90 label:"$@"   glitter_mask_trans.gif
convert glitter_plasma.gif null: glitter_mask_trans.gif -matte \
        -compose DstIn -layers composite        glitter_masked_trans.gif


cp -v glitter_masked_trans.gif ~/images/glitter.gif