Addy's art...

Today I was sitting at my desk working and all the sudden I hear my mom say, "Addy what did you do?"  And I proceeded to work because this isn't the first time I have heard my mom say this.  Then my mom says, "why did you do that?"  I'm getting curious, but still sitting working.  And then I hear, "Addy you can't do that to the walls, you can only draw on the paper."  So after I hear that I get up and go look to see what happened.  Here is what I see.....