Arch in gable of roof over door

[mojo6t5]

I have added another picture, please look carefully at my drawings and you can see my design is with an arch inthe gable end of the roof. You can see the arch better in the iso view. The straight on view shows the arch also but the decorative sunburst design over the door blends in with the arch in the gable.

I need to know how to design the arch in the door, not some decoration above the entrance door itself.

Thank you,
Mark