Learn Adobe Illustrator
Surely you know the simple color gradient that goes from one color to another, like this:
Now with the Illustrator CS4 software there is a gradient function for shapes, as this example shows:
You can obtain the gradient of shapes by selecting two shapes that you have previously created using the tool feather Or other.
You select the gradient of shapes under the color gradient tool in the tool window ofIllustrator,
or in the tab object / shape gradient / create.
Then you can modify the various parameters of the gradient tool in the tab object of your working window Illustrator CS4, to create changes in the gradients.
So! Have fun!