public static void RenderPrimitiveShapes(Canvas canvas) {
canvas.DrawLine(5, 65, 200, 65, BasicColor.Red);
canvas.DrawLine(5, 67, 200, 67, BasicColor.Green);
canvas.DrawLine(5, 69, 200, 69, BasicColor.Blue);
canvas.DrawCircleFilled(30, 105, 23, (BasicColor)canvas.GetRGB24toRGB565(0x33, 0x00, 0x00));
canvas.DrawCircleFilled(30, 105, 19, (BasicColor)canvas.GetRGB24toRGB565(0x66, 0x00, 0x00));
canvas.DrawCircleFilled(30, 105, 15, (BasicColor)canvas.GetRGB24toRGB565(0x99, 0x00, 0x00));
canvas.DrawCircleFilled(30, 105, 11, (BasicColor)canvas.GetRGB24toRGB565(0xCC, 0x00, 0x00));
canvas.DrawCircleFilled(30, 105, 7, (BasicColor)canvas.GetRGB24toRGB565(0xFF, 0x00, 0x00));
canvas.DrawRectangleFilled(80, 80, 180, 125, (BasicColor)GrayScaleValues.Gray_15);
canvas.DrawRectangleFilled(85, 85, 175, 120, (BasicColor)GrayScaleValues.Gray_30);
canvas.DrawRectangleFilled(90, 90, 170, 115, (BasicColor)GrayScaleValues.Gray_50);
canvas.DrawRectangleFilled(95, 95, 165, 110, (BasicColor)GrayScaleValues.Gray_80);
canvas.DrawRectangleFilled(100, 100, 160, 105, (BasicColor)GrayScaleValues.Gray_128);
}
