I want to repeat only one song. But it doesn't work as I expected

I want to repeat only one song. But it doesn't work as I expected.

Item {
     id: repeat
     height: parent.height *0.2
     width: parent.height *0.2
     x: parent.width * 0.015
     y: parent.height * 0.15
     anchors.horizontalCenter: parent.left
     Image {
          anchors.rightMargin: -220
          anchors.bottomMargin: -23
          anchors.leftMargin: 188
          anchors.topMargin: 0
          anchors.fill: parent
          fillMode: Image.PreserveAspectFit
          source: mediaplayer.isPlaying == false?"Images/IconRepeat_On.png":"Images/IconRepeat_Off.png"
     }
     ColorOverlay {
          anchors.fill: parent
          source: parent
          color: "white"
          anchors.rightMargin: -220
          anchors.bottomMargin: -23
          anchors.leftMargin: 188
          anchors.topMargin: 0
     }
     SoundEffect {
          id: playSound
          loops: SoundEffect.Infinite
          source: "file:///var/media_player/FSoftADS.mp4"
     }
     MouseArea {
          anchors.rightMargin: -220
          anchors.bottomMargin: -23
          anchors.leftMargin: 188
          anchors.topMargin: 0
          anchors.fill: parent
          onPressed: {playMusic.play()}
          }
     }
}

error display is ReferenceError: playMusic is not defined