     let kSyntaxErrorColor = NSColor.orangeColor()
     let kParseErrorColor = NSColor.magentaColor()
     let kFailedErrorColor = NSColor.redColor()
-    
+    let kThinkingColor = NSColor.purpleColor()
+
     let kIllegalSexprString = "Illegal sexpression"
     let kParseErrorString = "Syntax error"
     let kEvaluationFailedString = "Evaluation failed"
+    let kThinkingString = "???"
+
     
     init(editorWindowController: EditorWindowController, schemeScriptPathString: String, taskType: String) {
         self.editorWindowController = editorWindowController

        }
    }
    
    override func main() {
        
        if self.cancelled {

    func runSchemeCode() {
        
        startSpinner()
        thinkingColorAndLabel()
        
        // If we move to only support macOS 10.12, can use the improved time difference code adapted from JeremyP's answer to http://stackoverflow.com/questions/24755558/measure-elapsed-time-in-swift.  Instead we'll use JeremyP's NSDate version instead.
        let startTime = NSDate();
