#!/bin/sh

blur() {
    hsetroot -fill $HOME/wall.png -blur ${1:-10}
}

wew | while IFS=: read ev wid; do
    case $ev in
        # window creation
        16) wattr o "$wid" || test "$(lsw)" = "$wid" && blur ;;

        # window deletion
        18) test -z "$(lsw)" && blur 0 ;;
    esac
done