Found this

Made that

With an empty inverted polygon layer, the canvas on 0 0,

with_variable(
  'line_star',
  collect_geometries(
    with_variable(
      'buffered_point_array',
      geometries_to_array(
        nodes_to_points(  
          buffer(make_point(0,0), distance:=100, segments:=42),
          ignore_closing_nodes:=True
        )
      ),
      array_foreach(
        @buffered_point_array,
        make_line(
          @canvas_cursor_point,
          @element
        )
      )
    )
  ),
  with_variable(
    'donut_line_star',
    difference(
      @line_star,
      buffer(
        @canvas_cursor_point,
        distance:=sin(scale_linear(epoch(now())%10000/100, 0, 100, -pi(), pi()))*30+30,  -- %10000/100 = 0-100
        segments:=42
      )
    ),
    collect_geometries(
      @donut_line_star,
      intersection(
        rotate(@donut_line_star, 1),
        translate(
          buffer(
            @canvas_cursor_point, 
            distance:=sin(scale_linear(epoch(now())%10000/100, 0, 100, -pi(), pi()))*50+50,  -- %10000/100 = 0-100
            segments:=42
          ),
          sin(scale_linear(epoch(now())%10000/100, 0, 100, -pi(), pi())),  -- %10000/100 = 0-100
          0
        )
      )
    )
  )
)

and an arrow style with feature blending.