When I'm home alone

My dad and mum have gone to the theatre. I’m home alone this evening.
Dai, composer, invited them to his concert.
 
I like to do a lot of things when I’m home alone. There are certain activities that bring me such pleasure. 
And I think it is right to do.
 
Sometimes when I’m home alone, I run up and down the stairs and sniff my food.
Usually when I’m home alone, I scratch myself and pull my hair out.
Sometimes when I’m home alone, I roll around the floor and grab a spider.
Usually when I’m home alone, I look for a plastic bag and put it over my head. 
sometimes when I’m home alone, I get in my litter tray, scatter my droppings and pretend it’s accidental.
Usually when I’m home alone, I cover myself with my blanket and pretend I’m a good boy. 
 
My dad and mum always pretend to know what I do when I’m home alone.