*** empty log message ***
diff --git a/minus.gif b/minus.gif
new file mode 100644
index 0000000..8ee5ec1
--- /dev/null
+++ b/minus.gif
Binary files differ
diff --git a/plus.gif b/plus.gif
new file mode 100644
index 0000000..a74c11d
--- /dev/null
+++ b/plus.gif
Binary files differ