Swivel or vertically rotation

Hello my dear friends, i need your your valuable suggestions about swivel motorized motion. You can understand the motion from the picture. This rotation is provided by dc gear motor slowly, totally about 270 degree about right and left. 135 degree right, 135 degree left by remote control. The load over the system is about 50kg. To provide this motion how alternatives can be created, which of them are suitable and feasible.


<a href="https://www.flickr.com/photos/61559393@N02/5602598748/" target="_blank" rel="nofollow noopener noreferrer">swivel | cem.hakan | Flickr</a>