If someone has the answer could you help me, please?
I have 2 images - background similar to arc and arrow. And i need to move arrow image over background image like this is a clock ticker arrow. So i need :

1. Rotate arrow to make it parallel to current tick on the arc
2. Move arrow to the next point

For this i need to use Canvas object in JavaScript and its method transform - this will allow to move arrow and rotate it. 

The question is : how to use canvas.transform method to rotate (and desirable move) arrow around the arc? And which values and what relation between them should be in this case :

```
contextData.clearRect (0, 0, contextData.canvas.width, contextData.canvas.height);
contextData.save ();
contextData.translate(indicatorData.width () / 2, indicatorData.height () / 2);
contextData.transform(1, 0, 0, 1, x, y);  // the question is HERE
contextData.drawImage(rotationArrow, -rotationArrow.width / 2, -rotationArrow.height / 2);
contextData.restore ();

```

Thanks in advance.