Who are you?

// I made this as a sort of yin-yang.  Some parts of my 
// personality change, while others stay the same.  
// Sometimes, they are in harmony, other times they 
// conflict.  My favorite thing to do with this piece is to 
// move the mouse in circles at different places.
// That shows me right after a final exam when my 
// head is spinning.

paper 50
forever
{
   pen <mouse 2>
   repeat a 0 100
   {
      line a 50 a a
   }
   pen <mouse 1>
   repeat b 100 0
   {
      line b b 50 b
   }
   pen 0
   line 0 0 100 100
   pen 100
   line 0 100 100 0
}