collections {
   group { name: "main";
      script {
         public toggle;
      }
      parts {
         part { name: "bg";
            type: RECT;
            description { state: "default" 0.0;
               color: 255 255 255 255;
            }
         }
         part { name: "label";
            type: TEXT;
            description { state: "default" 0.0;
               color: 0 0 0 255;
               text {
                  text: "Click me.";
                  font: "Sans";
                  size: 12;
                  align: 0.5 0.8;
               }
            }
         }
         part { name: "rect";
            type: RECT;
            description { state: "default" 0.0;
               color: 255 0 0 255;
               max: 30 30;
               align: 0.1 0.2;
            }
            description { state: "default" 1.0;
               inherit: "default" 0.0;
               color: 0 0 255 255;
               align: 0.9 0.2;
            }
         }
      }
      programs {
         program { name: "go_right";
            action: STATE_SET "default" 1.0;
            transition: SINUSOIDAL 1.0;
            target: "rect";
         }
         program { name: "go_left";
            action: STATE_SET "default" 0.0;
            transition: SINUSOIDAL 1.0;
            target: "rect";
         }
         program {
            signal: "mouse,down,1";
            source: "label";
            script {
               if (get_int(toggle) == 0) {
                  run_program(PROGRAM:"go_right");
                  set_int(toggle, 1);
               }
               else {
                  run_program(PROGRAM:"go_left");
                  set_int(toggle, 0);
               }
            }
         }
      }
   }
}