<prompt> Kuzalisha code kuongeza background gradient kwa block mstatili.  <response>: Heres an example code that adds a linear background gradient to a rectangular block using CSS and HTML:html This code creates a rectangular div with a defined width and height, and sets its background to a linear gradient that goes from top to bottom, transitioning from color 33ccff to ff99cc.You can change the direction of the gradient, the colors, and the position, by modifying the values in the background property. Also, you can define more colors with their corresponding stop points to create more complex gradients for your rectangle block. 