实时显示触摸点颜色

requestScreenCapture();
console.show();
events.observeTouch();
events.setTouchEventTimeout(30);
events.on("touch", function(point) {
    var c = colors.toString(images.pixel(captureScreen(), point.x, point.y));
    log("(" + point.x + ", " + point.y + "): " + c);
});