favicon

#!/bin/bash
convert $1 \
    \( -clone 0 -resize 16x16 \) \
    \( -clone 0 -resize 24x24 \) \
    \( -clone 0 -resize 32x32 \) \
    \( -clone 0 -resize 48x48 \) \
    \( -clone 0 -resize 64x64 \) \
    favicon.ico