design background for toon boom

Hello friends.
I come from Vietnam . I am using software harmony 12 , I want to ask you about the gradients as background effects will use to do it .
If you have video tutorials are good too .
I just use the software Harmny 12 .
.you help me .

Yes, you can…
https://c1.staticflickr.com/1/552/18449602123_b8cf3fbfda_h.jpg