HTML canvas clock
-A don't animate
-b box around the clock (square, using background color)
-B box with border (only with -b)
-c use custom colors
-C close icon (only with -b, requires url)
-H no hour
-M no min
-r round edges (only with -b)
-s studio clock style
-S no sec
ONO::Lib::DateTime::Clock->canvas_clock( $size, $hour, $min, $sec, $switches, $colors, $url );
returns: $CLOCK
Countdown clock.
ONO::Lib::DateTime::Clock->countdown( $year, $mon, $day, $hour, $min, $sec, $BLK_ref );