anchor.diff:      static final comparableIdx = 1;
       int totalChars;
       int mistakeCount = 0;
  +    InputElement number;
  +    int scrollAmount = 5;
  +    int scrollDelay = 1;
  +    DivElement container;
  +    boolean active = true;
   
       void buildControls() {
       //    https://upload.wikimedia.org/wikipedia/commons/0/04/Keyboard_layout_ru%28typewriter%29.svg
  
positive.code:                 text += spaceChar;
              }
          }
          return text;
      }
  
  
negative.code: 
      void showMistake() {
          mistakeCount++;
          marquee.bgColor = '#911';
      }
  
      String generateText([int totalChars = 7, int spaceCharAfter = 3]) {
          this.totalChars = totalChars;
          String text = cursor;
          final Random random = new Random();
  