could be the first trick
The sun is a very easy. Simply move the diabolo around the stick with the string tense.
Usually, you arrive in a position where you have a kind of knot in your string. You should make the sun in the other direction to correct that (first video).
But you can also make another diabolo, behind the arms, or in your back.
You can make suns one after the other as much as you want, as soon as you make one in the front and one in the back (or behind you arms) .
It could be very smart and beautiful if you make it very fluid, like the last video.