After you do your 2 colors you go to the gear button and click the red arrow and that would save it, then go to the new beta editor, and click the gear button again and click the green arrow and then if ur on a chromebook or at least a device that does this, go to recent and click in the 1st recent one and then click ok, next you click on the zoom in button and you zoom it in, and you should start to get a gradient in it.