add transparency flash on node focus

focus_flash.sh

@@ -0,0 +1,8 @@
+#!/bin/sh
+
+bspc subscribe node_focus | while read -a msg ; do
+	_id=${msg[3]}
+	transset-df --id "$_id" 0.7 \
+		&& sleep 0.2 \
+		&& transset-df --id "$_id" 1
+done