gimpH help for the GIMP ( graphics image manipulation program )

How to make a ellipse

1 - Layer > New layer 

2 - Make the layer to be the same size as the image and layer fill type to transparency. This should be already selected by default.
3 - On the toolbox select the ellipse select tool and make an ellipse
4 - Use the bucket fill tool to paint the ellipse with your desired color.
5 - Right click on it and go to Select > Shrink... 
6 - Type in how many pixels you want the border to be and click ok.
7 - Go to the menu and click Edit > Clear.
8-  Select the ellipse by using colour select then paste it to you destination image.