Canvas Games: Part I - HTML5 Canvas - page 654

context . lineTo ( 0 , - 1 );
context . moveTo ( - 1 , - 1 );
context . lineTo ( - 10 , 9 );
context . lineTo ( - 1 , - 10 );
context . stroke ();
context . closePath ();
//restore context
context . restore (); //pop old state on to screen
//add to rotation
alpha += . 01 ;
iif ( alpha > 1 ) {
alpha = 0 ;
}
}