What would you do if a stranger came into your house and you were all alone?

well first i woulds screams cause i ams 4 and strangers is scary!  den i would compoase minself.  i woulds kick him in tha shin then call 911.  i would run to tha bafroom and lock tha door.  then i would sing justin bieber to minself really lous until tha police mans came.