rotate

gistfile1.js

function checkKey(e) {

    e = e || window.event;

    if (rotation >= 360) {
    	rotation = Math.abs(rotation % 360); 
    } else if (rotation <= 0) {
    	rotation += 360;
    }

    if (e.keyCode == '37') {
    	rotation -= 5;
        follower[0].style.webkitTransform = 'rotate(' + rotation + 'deg)';
    } else if (e.keyCode == '39') {
        rotation += 5;
        follower[0].style.webkitTransform = 'rotate(' + rotation + 'deg)';
    } else if (e.keyCode == '38') {
    	// up arrow
    } else if (e.keyCode == '40') {
    	// down arrow
    }
}