MY tutorial is on making a decent animation. The animation changes color looks cool. I dont know what to say, but its quick and simple to do. The outcome is really rewarding
1st start off with a simple white background.
Set the "Line" tool to 100 transparency, and Pen thickness to 7. Now, decide on your first color (ex: red. in the box with the shading and tinting of the color, click on the top-right side. Now, you can start drawing =D. make lines of that color right next to each other. After each line, tint (make lighter) or shade (make darker) the color you chose, very slightly. cover up all the White.
Now that you have the basics, make many layers, each one covering up the last. TRy different patterns. (like shown in the picture)
1# TIP: Make the Difference between colors as little as possible.
2# TIP: When making the pattern in the picture, i recomend starting with a line going form top to buttom, in the middle of the page. then start either to the left or the right, with the tinted/shaded color. When you start from the left/right make sure to finish the line on the opposite side.
final words: make many layers i would say 10 at least. have fun =D its easy you will get the hang of it really quickly.