diff --git a/bin/br b/bin/br
new file mode 100755
index 0000000..6d9ed73
--- /dev/null
+++ b/bin/br
@@ -0,0 +1,21 @@
+#!/bin/sh
+
+if [ "$#" -lt 2 ]; then
+    echo "Usage: $0 <target> <replacement>"
+    exit 1
+fi
+
+REDFG=$(printf '\033[31m')
+BLUBG=$(printf '\033[42m')
+ag --color "$1" . | sed -E "s/$1/\\0$REDFG$BLUBG$2/g"
+echo Are they ok for you?
+read -r YN
+
+case "$YN" in
+    y|Y)
+        ag "$1" . -l -0 | xargs -0 sed -Ei "s/$1/$2/g"
+        ;;
+    *)
+        exit
+        ;;
+esac