unable to use drawArc

Hi all,

I'm trying to create a watchface.

I want to create an arc for calories.

I'm unable to use drawArc.

I load layout, then in onUpdate(dc as Dc) I try to draw an arc like this:

dc.setPenWidth(10);
dc.setColor(Graphics.COLOR_RED, Graphics.COLOR_BLACK);
var halfHeight = dc.getHeight() / 2;
var halfWidth = dc.getWidth() / 2;
var radius = (halfHeight > halfWidth) ? halfWidth : halfHeight;
dc.drawArc(dc.getHeight() / 2, dc.getWidth() / 2, radius, Graphics.ARC_CLOCKWISE, 0, 360);

Don't know why setPenWitdh, don't know what is second color on dc.setColor.

This was a try just for see if I was able to draw an arc.