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#!/bin/sh
set -xe
circle_coordinates="256,256,256"
background_color="white"
foreground_color="black"
convert -size 512x512 \
"xc:${backgrond_color}" \
-fill "${foreground_color}" \
-draw "circle ${circle_coordinates},32" \
-fill "${background_color}" \
-draw "circle ${circle_coordinates},96" \
"${1}.png"
convert "${1}.png" -resize "50%" "${1}-medium.png"
convert "${1}.png" -resize "25%" "${1}-small.png"
convert "${1}-small.png" \
-level -10%,12% \
-ordered-dither o8x8 \
"${1}-dithered.png"
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