Algorithm for filling a Rectangle's color using raster's setPixel Method

Any ideas on how I would go about writing this?
[54 byte] By [MattBallarda] at [2007-11-27 7:05:32]
# 1
setPixel(...)-> one pixelsetPixels(...) -> more pixels
prometheuzza at 2007-7-12 18:56:46 > top of Java-index,Java Essentials,Java Programming...