Building user interaction 113 On the upper left in the figure we see the list of function calls until the error is generated (1). In the middle is the source code, already scrolled to the line that generated the error (2). At the bottom is the console with a textual description of the error (3). On the right an interactive list of variables with their cur- rentvalues(4).Thiswillparticularlybehelpfulwhenweusethe stepper. stepping Tointerrupttheexecutionofanapplicationandinspectitwe have to place a breakpoint. Let's say we have the following piece of code, which stores in a variable the number of times that the user changes color. <s:Application . . .> <fx:Script> <![CDATA[ private var _times:int = 0; private function onChange():void {