Spooky

This is my door entry buzzer
Last night just before two am I was woken by the buzzer going and the motion light outside went on
I looked out the window and shouted 
"Who's there?"no one said anything
I got back on bed clutching my mobile phone just in case
I never slept after that but now I'm up and it's daylight it all seems a bit silly
But I was quite spooked in the night
Fingers crossed it don't happen again tonight