diff --git a/caffeine.sh b/caffeine.sh
new file mode 100755
index 0000000..4351516
--- /dev/null
+++ b/caffeine.sh
@@ -0,0 +1,8 @@
+#!/bin/sh
+
+while : 
+do
+    echo "pressing shift key."
+    wtype -M shift -m shift
+    sleep 60
+done