title: Get bubble effect in java GWT Canvas?
body: <p>I want to get Bubble effects in java GWT Canvas, I have circles with different x, y, position and different radius, so want to increase their radius slowly slowly like they are coming front and closer and at some specific radius I want it to be disappeared slowly, i.e. decrease their opacity slowly and finally removed.
  Can anyone have idea How can I get this done?</p>