I chose the palette from COOLORS by selecting the color I want. When seeing this palette, I do not know why I thought that is the palette I desire. Maybe because its palette looks stable and match to each other. Those colors are not too bright.
Then, I begin to draw something in Adobe illustrator by using gradient and simple shape to make blend effects. Even those are only simple shapes, when configuration is different, it can create varied types of compositions. I really enjoyed while creating some 3D-like effect by using 2D objects.