[Rookie] drawText Does Not Draw

Hi everyone,

I just started my Monkey C journey and ran into this wall. Here's my code for drawing some text on the screen

- Simulated Device: Forerunner 245 Music

- SDK: 7.0.2 Beta

```

   // Update the view

    function onUpdate(dc as Dc) as Void {
        //setLayout(Rez.Layouts.WatchFace(dc));
        //dc.clear();

        var width = dc.getWidth(); //width = 240
        var height = dc.getHeight(); //height = 240  

        // Get and show the current time
        var clockTime = System.getClockTime();
        var timeString = Lang.format("$1$:$2$", [clockTime.hour, clockTime.min.format("%02d")]);

        //timeString.draw(dc);

        // Draw the time
        dc.setColor(Graphics.COLOR_YELLOW, Graphics.COLOR_TRANSPARENT);
        dc.drawText(
            width/2,
            height/2,
            Graphics.FONT_LARGE,
            timeString,
            Graphics.TEXT_JUSTIFY_CENTER
        );

        // Another test draw
        dc.setColor(Graphics.COLOR_BLUE, Graphics.COLOR_BLACK);
        dc.fillRectangle(100, 100, 100, 100);

        // Call the parent onUpdate function to redraw the layout
        View.onUpdate(dc);
    }
 
```
When I ran the code, the screen was just blank and black. I have searched the forum and did not seen a solution. Could someone find out why?
Thank you for reading this.